Dr. Leonard Charles Glaser , MD
Internal Medicine โข Naples, FL
8340 Collier Blvd Ste 405
Naples, FL 34114
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. Leonard Glaser is listed in NPPES under Internal Medicine.
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NPI assigned on June 27, 2006; this date does not establish years in practice.
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Published CMS data list 1,937 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99214 โ Established patient outpatient office visit: 754 service units.
- G0439 โ Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit: 340 service units.
- 99454 โ Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days: 207 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 15 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 11,019 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Atorvastatin Calcium โ 920 prescription fills, including refills.
- Amlodipine Besylate โ 695 prescription fills, including refills.
- Losartan Potassium โ 657 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 163 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 60% of clinicians listed under Internal Medicine in Naples, FL (2024, 110 clinicians with data). Median for this group: 1,446. Middle half: 575 to 3,729.
More Medicare Part B services than 75% of clinicians listed under Internal Medicine in Florida (2024, 5,815 clinicians with data). Median for this group: 687. Middle half: 277 to 1,489.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 1,128 in 2020 to 1,937 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
8340 Collier Blvd Ste 405
Naples, FL 34114
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Southington, CT. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: Collier Hma Physician Management Llc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
1977
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
553 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $192,348 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $144,979 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
27,936 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$825,177 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $254.78 across 12 records.
By nature of payment
- Food and Beverage: $254.78 across 12 records.
Reporting-company totals (3 largest of 7)
- Philips North America LLC: $52.06 across 2 records.
- ABBVIE INC.: $50.73 across 2 records.
- CVRx, Inc.: $38.95 across 2 records.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2025 (published June 30, 2026).
Years since graduation
49 years (graduated 1977)
CMS Doctors and Clinicians data list 1977 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Glaser has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Glaser as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Naples and Florida
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 60% of clinicians listed under Internal Medicine in Naples, FL (2024, 110 clinicians with data). Median for this group: 1,446. Middle half: 575 to 3,729.
More Medicare Part B services than 75% of clinicians listed under Internal Medicine in Florida (2024, 5,815 clinicians with data). Median for this group: 687. Middle half: 277 to 1,489.
Medicare-allowed amount
A higher Medicare-allowed amount than 65% of clinicians listed under Internal Medicine in Naples, FL (2024, 110 clinicians with data). Median for this group: $140,716. Middle half: $58,754 to $257,751.
A higher Medicare-allowed amount than 80% of clinicians listed under Internal Medicine in Florida (2024, 5,815 clinicians with data). Median for this group: $68,256. Middle half: $27,620 to $138,398.
Paid by Medicare
A higher Medicare payment amount than 65% of clinicians listed under Internal Medicine in Naples, FL (2024, 110 clinicians with data). Median for this group: $108,229. Middle half: $47,178 to $194,250.
A higher Medicare payment amount than 80% of clinicians listed under Internal Medicine in Florida (2024, 5,815 clinicians with data). Median for this group: $52,728. Middle half: $20,807 to $107,475.
Medicare Part D prescriptions
More Part D prescriptions than 90% of clinicians listed under Internal Medicine in Naples, FL (2024, 150 clinicians with data). Median for this group: 1,032. Middle half: 154 to 4,796.
More Part D prescriptions than 90% of clinicians listed under Internal Medicine in Florida (2024, 6,545 clinicians with data). Median for this group: 1,318. Middle half: 158 to 5,882.
Part D drug cost
A higher Part D drug cost than 85% of clinicians listed under Internal Medicine in Naples, FL (2024, 150 clinicians with data). Median for this group: $78,966. Middle half: $11,267 to $510,855.
A higher Part D drug cost than 85% of clinicians listed under Internal Medicine in Florida (2024, 6,545 clinicians with data). Median for this group: $86,865. Middle half: $8,159 to $434,445.
208 active clinicians are listed under Internal Medicine with a practice address in Naples, FL (10,165 in Florida).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Naples
22.1% of these 208 clinicians have the CMS telehealth indicator.
59.6% of these 208 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 72% from 1,128 in 2020 to 1,937 in 2024.
- 2020: 1,128
- 2021: 2,134
- 2022: 2,068
- 2023: 1,909
- 2024: 1,937
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Medicare-allowed amount
Medicare-allowed amount increased 70% from $113,173 in 2020 to $192,348 in 2024.
- 2020: $113,173
- 2021: $260,468
- 2022: $222,263
- 2023: $190,693
- 2024: $192,348
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Paid by Medicare
Paid by Medicare increased 79% from $80,949 in 2020 to $144,979 in 2024.
- 2020: $80,949
- 2021: $195,721
- 2022: $159,740
- 2023: $142,215
- 2024: $144,979
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 182% from 3,910 in 2020 to 11,019 in 2024.
- 2020: 3,910
- 2021: 8,242
- 2022: 11,218
- 2023: 11,588
- 2024: 11,019
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30-day fills
30-day fills increased 305% from 6,899 in 2020 to 27,936 in 2024.
- 2020: 6,899
- 2021: 18,900
- 2022: 27,463
- 2023: 29,193
- 2024: 27,936
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Part D drug cost
Part D drug cost increased 300% from $206,244 in 2020 to $825,177 in 2024.
- 2020: $206,244
- 2021: $584,400
- 2022: $823,795
- 2023: $1,005,103
- 2024: $825,177
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $16.51 in 2021 to $254.78 in 2025.
- 2021: $16.51
- 2022: $130.12
- 2023: $162.63
- 2024: $286.31
- 2025: $254.78
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2025 (payments made January 1 โ December 31, 2025): 12 records totaling $254.78.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
UBRELVY | General | $26.33 |
| Philips North America LLC |
Food and Beverage
Cash or cash equivalent
|
Diagnostic ECG Service | General | $26.31 |
| Philips North America LLC |
Food and Beverage
Cash or cash equivalent
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Diagnostic ECG Service | General | $25.75 |
| ABBVIE INC. |
Food and Beverage
In-kind items and services
|
UBRELVY | General | $24.40 |
| Novo Nordisk Inc |
Food and Beverage
In-kind items and services
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Wegovy | General | $23.74 |
| CVRx, Inc. |
Food and Beverage
Cash or cash equivalent
|
Barostim Neo System | General | $19.78 |
| CVRx, Inc. |
Food and Beverage
Cash or cash equivalent
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Barostim Neo System | General | $19.17 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
|
The Cologuard Plus Collection Kit | General | $18.89 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
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LEQVIO | General | $18.47 |
| Exact Sciences Corporation |
Food and Beverage
In-kind items and services
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Cologuard Collection Kit | General | $18.40 |
| Amgen Inc. |
Food and Beverage
In-kind items and services
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OTEZLA | General | $17.21 |
| Novartis Pharmaceuticals Corporation |
Food and Beverage
In-kind items and services
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LEQVIO | General | $16.33 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2017โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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754 | 453 | $297.00 | $130.03 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
|
340 | 340 | $309.00 | $131.62 |
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99454
Remote monitoring of physiologic parameters, initial supply of devices with daily recordings or programmed alerts transmission, each 30 days
|
207 | 51 | $134.00 | $47.13 |
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G0444
Annual depression screening, 5 to 15 minutes
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198 | 198 | $52.00 | $18.99 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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97 | 88 | $202.00 | $92.43 |
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99457
Management using the results of remote vital sign monitoring per calendar month, first 20 minutes
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94 | 47 | $133.00 | $49.60 |
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G0442
Annual alcohol misuse screening, 5 to 15 minutes
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52 | 52 | $52.00 | $18.86 |
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99453
Remote monitoring of physiologic parameters, initial set-up and patient education on use of equipment
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41 | 41 | $51.00 | $20.34 |
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99215
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
|
33 | 30 | $399.00 | $184.79 |
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G0438
Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit
|
27 | 27 | $466.00 | $164.56 |
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96372
Injection of drug or substance under skin or into muscle
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21 | 13 | $65.00 | $14.41 |
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99496
Transitional care management services for problem of high complexity
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21 | 19 | $637.00 | $282.35 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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20 | 20 | $461.00 | $171.53 |
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93000
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
|
19 | 19 | $81.00 | $14.72 |
|
36415
Insertion of needle into vein for collection of blood sample
|
13 | 13 | $10.00 | $8.65 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Atorvastatin Calcium | Atorvastatin Calcium | 920 | 79,825 | $7,771.94 | 276 |
| Amlodipine Besylate | Amlodipine Besylate | 695 | 59,171 | $5,030.26 | 213 |
| Losartan Potassium | Losartan Potassium | 657 | 57,770 | $5,909.97 | 209 |
| Lisinopril | Lisinopril | 454 | 37,457 | $3,650.88 | 127 |
| Levothyroxine Sodium | Levothyroxine Sodium | 355 | 30,961 | $3,455.36 | 105 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 331 | 28,967 | $5,293.92 | 102 |
| Metformin Hcl | Metformin Hcl | 283 | 24,400 | $1,932.55 | 86 |
| Metoprolol Succinate | Metoprolol Succinate | 260 | 22,584 | $3,809.16 | 83 |
| Omeprazole | Omeprazole | 249 | 22,023 | $4,027.08 | 81 |
| Sertraline Hcl | Sertraline Hcl | 209 | 15,403 | $1,789.33 | 55 |
| Trazodone Hcl | Trazodone Hcl | 198 | 16,298 | $2,088.34 | 61 |
| Alprazolam | Alprazolam | 195 | 6,749 | $1,324.55 | 56 |
| Pantoprazole Sodium | Pantoprazole Sodium | 191 | 16,270 | $2,808.46 | 67 |
| Hydrochlorothiazide | Hydrochlorothiazide | 188 | 16,195 | $696.24 | 62 |
| Zolpidem Tartrate | Zolpidem Tartrate | 175 | 11,915 | $2,197.64 | 60 |
| Simvastatin | Simvastatin | 174 | 15,230 | $1,273.23 | 53 |
| Tamsulosin Hcl | Tamsulosin Hcl | 167 | 14,559 | $2,903.73 | 64 |
| Alendronate Sodium | Alendronate Sodium | 164 | 13,442 | $1,384.14 | 53 |
| Allopurinol | Allopurinol | 152 | 13,569 | $1,425.53 | 48 |
| Escitalopram Oxalate | Escitalopram Oxalate | 140 | 11,996 | $1,765.15 | 41 |
| Gabapentin | Gabapentin | 124 | 9,173 | $3,338.57 | 43 |
| Clopidogrel | Clopidogrel Bisulfate | 120 | 8,383 | $1,903.37 | 28 |
| Glimepiride | Glimepiride | 101 | 8,356 | $804.50 | 29 |
| Eliquis | Apixaban | 101 | 5,862 | $114,959.48 | 27 |
| Ozempic | Semaglutide | 93 | 4,634 | $124,020.66 | 26 |
(top 25 shown)
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2020-09-15NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
NUCC Taxonomy Code: 207R00000X
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - INTERNAL MEDICINE
I20190613002799
FL
6901811470
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
Collier Hma Physician Management Llc
6101 Pine Ridge Rd, Naples, FL 341193900
Collier Hma Physician Management Llc
1839 San Marco Rd, Marco Island, FL 341456722
Phone: 2393941670
Collier Hma Physician Management Llc
8340 Collier Blvd, Naples, FL 341143625
Phone: 2393484224
Secondary Practice Locations
36o N Main St, Suite 3
Southington, CT 064892503
Phone: 8606218361
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Radiology - Vascular & Interventional Radiology
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Internal Medicine - Interventional Cardiology
Doctor of Medicine (M.D.)
Colon & Rectal Surgery
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 8340 COLLIER BLVD STE 405, NAPLES, FL 34114 (Tel: 2393484221)
Registered at PO BOX 11390, BELFAST, ME 049154004 (Tel: 2393484221)
NPI status registered as active in NPPES database
Registered at 36O N MAIN ST, SUITE 3, SOUTHINGTON, CT 064892503 (Tel: 8606218361)
Registered at 36O N MAIN ST, SUITE 3, SOUTHINGTON, CT 064892517 (Tel: 8606218361)
Recorded as LEONARD GLASER, MD
Internal Medicine (license number reported to NPPES: CT 022003)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Naples
- Dr. Joel Ying, MD
- Dr. Antonino Zampogna, MD
- Dr. Jonathan Marsh, MD
- Dr. George Ferguson, MD
- Ari Frenkel
- Dr. Alejandro Lopez Cohen, MD
Mailing Address
Po Box 11390
Belfast, ME 049154004
Phone: 2393484221