Dr. Patrick Leong , DO
Internal Medicine • Somerville, MA
440 Foley St
Somerville, MA 021451213
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. Patrick Leong is listed in NPPES under Internal Medicine.
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NPI assigned on December 27, 2005; this date does not establish years in practice.
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Published CMS data list 699 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 36415 — Insertion of needle into vein for collection of blood sample: 152 service units.
- 99214 — Established patient outpatient office visit: 145 service units.
- G0439 — Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit: 69 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® 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 · Guide: How to read Medicare Part B data
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Published CMS data list 532 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – 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 — 93 prescription fills, including refills.
- Amlodipine Besylate — 51 prescription fills, including refills.
- Omeprazole — 45 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 20 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 70% of clinicians listed under Internal Medicine in Somerville, MA (2024, 25 clinicians with data). Median for this group: 253. Middle half: 89 to 1,040.
More Medicare Part B services than 60% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,795 clinicians with data). Median for this group: 524. Middle half: 200 to 1,073.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 1,126 in 2020 to 699 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
440 Foley St
Somerville, MA 021451213
CMS Doctors and Clinicians lists 2 distinct group names: Massachusetts General Physicians Organization Inc; The General Hospital Corporation. 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
1983
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
156 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 – by Provider, 2024.
Medicare-allowed amount
About $60,423 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 – by Provider and Service, 2024.
Paid by Medicare
About $52,283 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 – by Provider and Service, 2024.
30-day fills
1,293 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
$62,939 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 – by Provider and Drug, 2024.
Industry payments (Open Payments)
No Open Payments records are listed for this clinician for 2019–2025.
Years since graduation
43 years (graduated 1983)
CMS Doctors and Clinicians data list 1983 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
2005
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, “Does your provider accept Medicare as full payment?”
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. Leong 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. Leong 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 Somerville and Massachusetts
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 70% of clinicians listed under Internal Medicine in Somerville, MA (2024, 25 clinicians with data). Median for this group: 253. Middle half: 89 to 1,040.
More Medicare Part B services than 60% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,795 clinicians with data). Median for this group: 524. Middle half: 200 to 1,073.
Medicare-allowed amount
A higher Medicare-allowed amount than 75% of clinicians listed under Internal Medicine in Somerville, MA (2024, 25 clinicians with data). Median for this group: $24,663. Middle half: $8,888 to $60,423.
Close to the middle for clinicians listed under Internal Medicine in Massachusetts (2024, 3,795 clinicians with data). Median for this group: $50,126. Middle half: $19,685 to $96,485.
Paid by Medicare
A higher Medicare payment amount than 80% of clinicians listed under Internal Medicine in Somerville, MA (2024, 25 clinicians with data). Median for this group: $19,184. Middle half: $7,081 to $50,675.
A higher Medicare payment amount than 60% of clinicians listed under Internal Medicine in Massachusetts (2024, 3,795 clinicians with data). Median for this group: $38,152. Middle half: $14,838 to $74,912.
Medicare Part D prescriptions
Fewer Part D prescriptions than 65% of clinicians listed under Internal Medicine in Somerville, MA (2024, 27 clinicians with data). Median for this group: 1,366. Middle half: 485 to 2,813.
Close to the middle for clinicians listed under Internal Medicine in Massachusetts (2024, 3,672 clinicians with data). Median for this group: 1,174. Middle half: 129 to 3,740.
Part D drug cost
Close to the middle for clinicians listed under Internal Medicine in Somerville, MA (2024, 27 clinicians with data). Median for this group: $99,959. Middle half: $15,486 to $299,553.
Close to the middle for clinicians listed under Internal Medicine in Massachusetts (2024, 3,672 clinicians with data). Median for this group: $103,819. Middle half: $9,088 to $319,703.
36 active clinicians are listed under Internal Medicine with a practice address in Somerville, MA (6,830 in Massachusetts).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Somerville
41.7% of these 36 clinicians have the CMS telehealth indicator.
72.2% of these 36 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 decreased 38% from 1,126 in 2020 to 699 in 2024.
- 2020: 1,126
- 2021: 1,119
- 2022: 851
- 2023: 404
- 2024: 699
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Medicare-allowed amount
Medicare-allowed amount decreased 24% from $79,327 in 2020 to $60,423 in 2024.
- 2020: $79,327
- 2021: $111,491
- 2022: $103,087
- 2023: $36,410
- 2024: $60,423
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Paid by Medicare
Paid by Medicare varied from year to year: $56,554 in 2020 and $52,283 in 2024.
- 2020: $56,554
- 2021: $84,007
- 2022: $86,095
- 2023: $27,800
- 2024: $52,283
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 91% from 5,602 in 2020 to 532 in 2024.
- 2020: 5,602
- 2021: 5,940
- 2022: 2,221
- 2023: 758
- 2024: 532
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30-day fills
30-day fills decreased 89% from 11,509 in 2020 to 1,293 in 2024.
- 2020: 11,509
- 2021: 12,216
- 2022: 5,013
- 2023: 1,863
- 2024: 1,293
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Part D drug cost
Part D drug cost decreased 85% from $417,817 in 2020 to $62,939 in 2024.
- 2020: $417,817
- 2021: $397,808
- 2022: $166,033
- 2023: $57,333
- 2024: $62,939
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 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 – by Provider and Service data, 2017–2024; 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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36415
Insertion of needle into vein for collection of blood sample
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152 | 100 | $29.70 | $8.65 |
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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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145 | 94 | $555.46 | $134.31 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
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69 | 69 | $566.43 | $142.48 |
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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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48 | 42 | $395.88 | $94.56 |
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G0442
Annual alcohol misuse screening, 5 to 15 minutes
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43 | 43 | $85.26 | $21.37 |
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G0444
Annual depression screening, 5 to 15 minutes
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40 | 40 | $85.13 | $21.37 |
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90480
Admn sarscov2 vacc 1 dose
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34 | 31 | $188.71 | $47.07 |
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90677
Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use
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30 | 30 | $654.33 | $290.24 |
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G0009
Administration of pneumococcal vaccine
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30 | 30 | $137.27 | $35.30 |
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G0008
Administration of influenza virus vaccine
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25 | 25 | $140.36 | $35.30 |
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90662
Influenza vaccine split virus, preservative free
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24 | 24 | $189.38 | $81.82 |
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91320
Sarscv2 vac 30mcg trs-suc im
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17 | 17 | $274.41 | $152.78 |
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91322
Sarscov2 vac 50 mcg/0.5ml im
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17 | 17 | $313.00 | $143.00 |
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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
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13 | 13 | $779.38 | $197.22 |
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99443
Telephone medical discussion with physician, 21-30 minutes
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12 | 11 | $556.33 | $140.40 |
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 | 93 | 7,938 | $1,487.85 | 45 |
| Amlodipine Besylate | Amlodipine Besylate | 51 | 4,170 | $539.28 | 23 |
| Omeprazole | Omeprazole | 45 | 3,780 | $821.39 | 23 |
| Jardiance | Empagliflozin | 41 | 2,190 | $41,357.17 | — |
| Lisinopril | Lisinopril | 36 | 2,760 | $276.57 | 19 |
| Metoprolol Succinate | Metoprolol Succinate | 33 | 2,970 | $599.07 | 16 |
| Tamsulosin Hcl | Tamsulosin Hcl | 22 | 1,980 | $414.96 | 12 |
| Telmisartan | Telmisartan | 21 | 1,350 | $449.00 | — |
| Furosemide | Furosemide | 20 | 1,374 | $111.71 | — |
| Prednisone | Prednisone | 19 | 545 | $61.10 | — |
| Sertraline Hcl | Sertraline Hcl | 19 | 1,185 | $152.59 | — |
| Hydrochlorothiazide | Hydrochlorothiazide | 19 | 1,710 | $72.42 | — |
| Ozempic | Semaglutide | 18 | 504 | $15,676.37 | — |
| Tramadol Hcl | Tramadol Hcl | 16 | 217 | $9.82 | — |
| Allopurinol | Allopurinol | 15 | 990 | $38.30 | — |
| Metformin Hcl | Metformin Hcl | 15 | 1,120 | $69.30 | — |
| Lorazepam | Lorazepam | 14 | 177 | $23.06 | — |
| Losartan Potassium | Losartan Potassium | 12 | 1,080 | $249.25 | — |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 12 | 1,020 | $435.23 | — |
| Levothyroxine Sodium | Levothyroxine Sodium | 11 | 966 | $94.37 | — |
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: 2023-08-02NUCC 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: 207Q00000X
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - FAMILY PRACTICE
I20220404001227
MA
6103843057
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
The General Hospital Corporation
55 Fruit St, Boston, MA 021142621
Phone: 6177262000
Massachusetts General Physicians Organization Inc
440 Foley St, Somerville, MA 021451213
Phone: 8572820777
Massachusetts General Physicians Organization Inc
55 Fruit St, Boston, MA 021142696
Phone: 6177240287
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant
Physician Assistant
Nurse Practitioner - Family
Nurse Practitioner (Certified)
Family Medicine
Doctor of Medicine (M.D.)
Nurse Practitioner - Family
Doctor of Nursing Practice, Family Nurse Practitioner (Board Certified)
Nurse Practitioner
Family Nurse Practitioner (Certified)
Internal 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 440 FOLEY ST, SOMERVILLE, MA 021451213 (Tel: 8572820777)
Registered at 440 FOLEY ST, SOMERVILLE, MA 021451213 (Tel: 8572820777)
Recorded as PATRICK LEONG, DO
NPI status registered as active in NPPES database
Registered at 4 DOBSON WAY, MERRIMACK, NH 030544340 (Tel: 6034244181)
Registered at PO BOX 808, NASHUA, NH 030610808
Recorded as PATRICK LEONG, M.D.
Family Medicine (license number reported to NPPES: NH 7813)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Somerville
- Laura Brightman
- Dr. Rachel Berger, MD
- Dr. Ingo Stubbe, MD
- Dr. Brian Smerkers, MD
- Dr. Gregory Johnson, MD
- Dr. Jessamyn Blau, MD
Mailing Address
440 Foley St
Somerville, MA 021451213
Phone: 8572820777