Dr. Stuart S Ferber , MD
Internal Medicine โข Buffalo Grove, IL
15 S Mchenry Rd
Buffalo Grove, IL 600896705
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. Stuart Ferber is listed in NPPES under Internal Medicine.
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NPI assigned on January 5, 2006; this date does not establish years in practice.
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Published CMS data list 2,235 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:
- 99213 โ Established patient outpatient office visit: 778 service units.
- G0439 โ Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit: 512 service units.
- 99214 โ Established patient outpatient office visit: 215 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 14 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 14,072 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 1,112 prescription fills, including refills.
- Amlodipine Besylate โ 713 prescription fills, including refills.
- Rosuvastatin Calcium โ 704 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 167 records in the table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 80% of clinicians listed under Internal Medicine in Buffalo Grove, IL (2024, 17 clinicians with data). Median for this group: 1,045. Middle half: 954 to 1,451.
More Medicare Part B services than 85% of clinicians listed under Internal Medicine in Illinois (2024, 3,231 clinicians with data). Median for this group: 696. Middle half: 284 to 1,352.
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 3,114 in 2020 to 2,235 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
15 S Mchenry Rd
Buffalo Grove, IL 600896705
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 2 distinct group names: Endeavor Health Medical Group; Select Rehabilitation, Llc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File, CMS release of October 2, 2026
1986
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
753 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 $231,116 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 $195,470 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
35,101 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
$889,179 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 2019
All general payments: $29.80 across 2 records.
By nature of payment
- Education: $29.80 across 2 records.
Reporting-company totals
- Boehringer Ingelheim Pharmaceuticals, Inc.: $29.80 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 2019 (published June 30, 2026).
Years since graduation
40 years (graduated 1986)
CMS Doctors and Clinicians data list 1986 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, CMS release of October 2, 2026.
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, CMS release of October 2, 2026; 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, CMS release of October 2, 2026.
Enrolled in Medicare (PECOS)
Dr. Ferber 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. Ferber 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 Buffalo Grove and Illinois
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 80% of clinicians listed under Internal Medicine in Buffalo Grove, IL (2024, 17 clinicians with data). Median for this group: 1,045. Middle half: 954 to 1,451.
More Medicare Part B services than 85% of clinicians listed under Internal Medicine in Illinois (2024, 3,231 clinicians with data). Median for this group: 696. Middle half: 284 to 1,352.
Medicare-allowed amount
A higher Medicare-allowed amount than 90% of clinicians listed under Internal Medicine in Buffalo Grove, IL (2024, 17 clinicians with data). Median for this group: $106,992. Middle half: $75,630 to $145,855.
A higher Medicare-allowed amount than 90% of clinicians listed under Internal Medicine in Illinois (2024, 3,231 clinicians with data). Median for this group: $67,573. Middle half: $27,616 to $124,710.
Paid by Medicare
A higher Medicare payment amount than 90% of clinicians listed under Internal Medicine in Buffalo Grove, IL (2024, 17 clinicians with data). Median for this group: $87,589. Middle half: $62,933 to $122,319.
A higher Medicare payment amount than 90% of clinicians listed under Internal Medicine in Illinois (2024, 3,231 clinicians with data). Median for this group: $52,732. Middle half: $21,099 to $98,198.
Medicare Part D prescriptions
More Part D prescriptions than 95% of clinicians listed under Internal Medicine in Buffalo Grove, IL (2024, 19 clinicians with data). Median for this group: 3,898. Middle half: 1,937 to 6,310.
More Part D prescriptions than 95% of clinicians listed under Internal Medicine in Illinois (2024, 3,708 clinicians with data). Median for this group: 1,080. Middle half: 101 to 4,782.
Part D drug cost
A higher Part D drug cost than 90% of clinicians listed under Internal Medicine in Buffalo Grove, IL (2024, 19 clinicians with data). Median for this group: $212,413. Middle half: $113,154 to $504,423.
A higher Part D drug cost than 90% of clinicians listed under Internal Medicine in Illinois (2024, 3,708 clinicians with data). Median for this group: $82,134. Middle half: $2,821 to $375,574.
25 active clinicians are listed under Internal Medicine with a practice address in Buffalo Grove, IL (7,195 in Illinois).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Buffalo Grove
52% of these 25 clinicians have the CMS telehealth indicator.
64% of these 25 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 28% from 3,114 in 2020 to 2,235 in 2024.
- 2020: 3,114
- 2021: 2,829
- 2022: 2,709
- 2023: 2,419
- 2024: 2,235
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Medicare-allowed amount
Medicare-allowed amount stayed about the same: $246,754 in 2020 and $231,116 in 2024.
- 2020: $246,754
- 2021: $272,555
- 2022: $270,641
- 2023: $244,755
- 2024: $231,116
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Paid by Medicare
Paid by Medicare stayed about the same: $200,987 in 2020 and $195,470 in 2024.
- 2020: $200,987
- 2021: $217,174
- 2022: $214,861
- 2023: $200,964
- 2024: $195,470
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 24% from 11,321 in 2020 to 14,072 in 2024.
- 2020: 11,321
- 2021: 11,499
- 2022: 12,472
- 2023: 13,009
- 2024: 14,072
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30-day fills
30-day fills increased 23% from 28,587 in 2020 to 35,101 in 2024.
- 2020: 28,587
- 2021: 29,739
- 2022: 31,304
- 2023: 33,059
- 2024: 35,101
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Part D drug cost
Part D drug cost increased 44% from $617,597 in 2020 to $889,179 in 2024.
- 2020: $617,597
- 2021: $667,243
- 2022: $773,883
- 2023: $894,820
- 2024: $889,179
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Industry payments (Open Payments)
CMS data for industry payments (Open Payments) are available for 2019 only.
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2019), CMS Doctors and Clinicians, CMS release of October 2, 2026, 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 2019 (payments made January 1 โ December 31, 2019): fewer than 11 records totaling $29.80.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Education
In-kind items and services
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SPIRIVA RESPIMAT | General | $14.90 |
| Boehringer Ingelheim Pharmaceuticals, Inc. |
Education
In-kind items and services
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SPIRIVA RESPIMAT | General | $14.90 |
Source: CMS Open Payments, program year 2019, 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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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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778 | 509 | $175.00 | $95.37 |
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G0439
Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
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512 | 512 | $283.00 | $137.19 |
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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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215 | 166 | $246.00 | $134.19 |
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G0008
Administration of influenza virus vaccine
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175 | 172 | $65.03 | $33.46 |
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90662
Influenza vaccine split virus, preservative free
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168 | 165 | $140.00 | $81.05 |
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99495
Transitional care management services for problem of at least moderate complexity
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102 | 82 | $419.00 | $217.13 |
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85610
Blood test, clotting time
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98 | 15 | $37.00 | $4.20 |
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93000
Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
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40 | 38 | $80.00 | $14.85 |
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99211
Office or other outpatient visit for the evaluation and management of established patient that may not require presence of healthcare professional
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34 | 11 | $61.00 | $24.39 |
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99442
Telephone medical discussion with physician, 11-20 minutes
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26 | 25 | $184.00 | $94.89 |
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G0402
Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment
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24 | 24 | $404.00 | $174.51 |
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G0009
Administration of pneumococcal vaccine
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22 | 22 | $48.00 | $33.45 |
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G0180
Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and
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21 | 18 | $195.00 | $56.41 |
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90677
Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use
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20 | 20 | $677.00 | $289.78 |
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 | 1,112 | 92,221 | $10,330.20 | 301 |
| Amlodipine Besylate | Amlodipine Besylate | 713 | 56,983 | $5,677.90 | 181 |
| Rosuvastatin Calcium | Rosuvastatin Calcium | 704 | 62,177 | $7,746.89 | 219 |
| Lisinopril | Lisinopril | 518 | 42,902 | $4,493.09 | 142 |
| Levothyroxine Sodium | Levothyroxine Sodium | 518 | 41,374 | $6,144.29 | 130 |
| Losartan Potassium | Losartan Potassium | 451 | 38,376 | $4,578.95 | 124 |
| Metoprolol Succinate | Metoprolol Succinate | 416 | 34,137 | $6,699.46 | 117 |
| Simvastatin | Simvastatin | 357 | 30,827 | $3,728.21 | 101 |
| Metformin Hcl | Metformin Hcl | 352 | 30,560 | $3,091.28 | 99 |
| Pantoprazole Sodium | Pantoprazole Sodium | 319 | 25,866 | $5,076.18 | 92 |
| Pravastatin Sodium | Pravastatin Sodium | 294 | 24,045 | $4,276.70 | 76 |
| Omeprazole | Omeprazole | 265 | 22,969 | $3,469.35 | 83 |
| Alprazolam | Alprazolam | 241 | 6,038 | $1,478.87 | 85 |
| Escitalopram Oxalate | Escitalopram Oxalate | 228 | 17,271 | $3,249.60 | 65 |
| Hydrochlorothiazide | Hydrochlorothiazide | 226 | 19,550 | $854.02 | 67 |
| Lisinopril-Hydrochlorothiazide | Lisinopril/Hydrochlorothiazide | 221 | 18,645 | $1,936.40 | 58 |
| Allopurinol | Allopurinol | 204 | 18,103 | $2,732.17 | 56 |
| Tamsulosin Hcl | Tamsulosin Hcl | 195 | 16,549 | $3,462.39 | 57 |
| Gabapentin | Gabapentin | 178 | 12,781 | $2,927.19 | 56 |
| Famotidine | Famotidine | 177 | 12,254 | $2,546.71 | 52 |
| Metoprolol Tartrate | Metoprolol Tartrate | 173 | 12,235 | $1,440.77 | 45 |
| Sertraline Hcl | Sertraline Hcl | 163 | 12,826 | $1,911.83 | 43 |
| Glimepiride | Glimepiride | 160 | 14,035 | $1,757.93 | 47 |
| Furosemide | Furosemide | 159 | 9,671 | $807.01 | 39 |
| Bupropion Xl | Bupropion Hcl | 150 | 8,499 | $4,288.42 | 29 |
(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: 2021-10-05NUCC 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
I20050510000165
IL
4385684372
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, CMS release of October 2, 2026
Endeavor Health Medical Group
1051 W Rand Rd, Arlington Heights, IL 600042315
Endeavor Health Medical Group
1200 W Algonquin Rd, Palatine, IL 600677373
Phone: 8476180535
Endeavor Health Medical Group
1450 Busch Pkwy, Buffalo Grove, IL 600894541
Phone: 8477258640
Endeavor Health Medical Group
15 S Mchenry Rd, Buffalo Grove, IL 600896705
Phone: 8475209424
Endeavor Health Medical Group
199 W Rand Rd, Mount Prospect, IL 600561151
Phone: 8476185400
Endeavor Health Medical Group
2650 Ridge Ave, Evanston, IL 602011700
Select Rehabilitation, Llc
2600 Compass Rd, Glenview, IL 600268001
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner
APNCNP
Family Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Family Medicine
Doctor of Medicine (M.D.)
Physician Assistant
Physician Assistant (Certified)
Internal Medicine
Doctor of Osteopathic Medicine (D.O.)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 15 S MCHENRY RD, BUFFALO GROVE, IL 600896705 (Tel: 8476180351)
Registered at 15 S MCHENRY RD, BUFFALO GROVE, IL 600896705 (Tel: 8476180351)
Registered at 1450 BUSCH PKWY STE 100, BUFFALO GROVE, IL 600894541 (Tel: 8474597860)
NPI status registered as active in NPPES database
Registered at 1450 BUSCH PKWY, BUFFALO GROVE, IL 600894541 (Tel: 8474597860)
Registered at 25233 NETWORK PLACE, CHICAGO, IL 606731252 (Tel: 6303901240)
Recorded as STUART FERBER, M.D.
Internal Medicine (license number reported to NPPES: IL 036076644)
NPI status registered as active in NPPES database
Registered at 1450 BUSCH PARKWAY, BUFFALO GROVE, IL 600894541 (Tel: 8475377744)
Registered at 25233 NETWORK PLACE, CHICAGO, IL 606731252 (Tel: 6303901240)
Recorded as STUART FERBER, M.D.
Internal Medicine (license number reported to NPPES: IL 036076644)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Buffalo Grove
- Dr. Gabriel Kibrit, MD
- Dr. Lidiya Kupriyenko, MD
- Dr. Olga Zarkh, MD
- Dr. Margaret Fruhbauer, DO
- Dr. Wendi Marcus, MD
- Dr. Thomas Heggen, MD
Mailing Address
15 S Mchenry Rd
Buffalo Grove, IL 600896705
Phone: 8476180351