NPI registry status
Active
2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1346434578 M.D.
Verify on CMS → Ilya Fishman, M.D.
Geriatric Medicine (Internal Medicine) Physician in Elk Grove Village, Illinois.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 4,161 in Geriatric Medicine (Internal Medicine) Physician, and covers specialty classification, practice address, and Medicare Part D prescribing data when reported. According to CMS, every field reflects the provider's official federal registration, see our methodology.
Federal data, no proprietary rating.
We show these CMS records as-is - no composite score, no star rating, no editorial opinion layered on top.
Prescribing volume
28K
Medicare Part D claims · 555 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
89%
generic claims · 11% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
84.2/100
▲ 1 pts above national avg 83.1 · Above neutral
Industry payments
$509.39
25 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
Compiled from official public sources by the PlainDoctor editorial team.
What the federal data shows
Ilya Fishman, M.D. reported a CMS MIPS final score of 84.2/100 - above the 83.1 national average - and filed 27,754 Medicare Part D claims in 2023.
- 84.2/100
- MIPS score · +1 vs avg
- 28K
- Part D claims, 2023
- 89%
- generic prescribing
- Likely
- board-certified (heuristic)
Every figure on this page comes straight from federal CMS records (NPPES, Medicare Part D, MIPS, Open Payments) - no proprietary rating or editorial opinion is applied.
Ilya Fishman, M.D.'s MIPS score vs every scored U.S. clinician
CMS Merit-based Incentive Payment System (MIPS) final score, 2023, the federal quality measure
84 45th percentile higher than 45% of 477,587 scored providers
Each bar is a band; taller bars hold more scored providers. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source CMS Merit-based Incentive Payment System (MIPS) · 2023
Where Ilya Fishman, M.D. sits
This provider among geriatric medicine (internal medicine) physician peers
Across the 724 geriatric medicine (internal medicine) physician providers who report both Medicare Part D prescribing and a MIPS quality score, Ilya Fishman, M.D. writes more Part D claims than 97% of them and scores higher on MIPS quality than 46% - placing this provider in the high-volume, lower-quality quadrant. Volume reflects patient-panel size and specialty, not quality; the two axes are independent.
Part D claim volume vs MIPS quality, by specialty percentile
Each dot is one geriatric medicine (internal medicine) physician peer from a representative sample of 60; the gold marker is Ilya Fishman, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Ilya Fishman, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting - signals consistent with board-certified status. For verified board certification, see CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Ilya Fishman, M.D.?
Near national averagePrimary specialty
Geriatric Medicine (Internal Medicine) Physician
Medicare Part D claims
27,754 6× vs specialty avg
MIPS final score
84.2/100 1.1 pts vs avg
Specialty distribution in Illinois
How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among Illinois providers
Medicare quality performance, MIPS
Ilya Fishman, M.D.'s 2023 MIPS final score plotted against the Geriatric Medicine (Internal Medicine) Physician national average
- MIPS Final Score
- 84.2/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Geriatric Medicine (Internal Medicine) Physician) - 84.2/100 vs national avg 83.1
How MIPS and board certification work
The Merit-based Incentive Payment System (MIPS) scores providers 0–100 across four performance categories: Quality, Cost, Promoting Interoperability, and Improvement Activities, weighted under 42 CFR §414.1380. Reporting is voluntary for many small practices, so absence of a MIPS score is not a quality signal.
Board certification through an ABMS or AOA member board signals voluntary post-licensure examination plus continuous Maintenance of Certification cycles. Verify any individual provider's status through certificationmatters.org (ABMS) or osteopathic.org (AOA).
Ilya Fishman, M.D. appears in the CMS NPPES registry as a Geriatric Medicine (Internal Medicine) Physician provider holding M.D. credentials at 800 BIESTERFIELD RD, Elk Grove Village, IL, 60007, with a listed phone of (847) 364-6724. NPI 1346434578 was issued on 08/30/2007.
Medicare Part D records for calendar year 2023 show 27,754 prescription claims written by this provider, covering 555 Medicare beneficiaries and totaling roughly $1.6 million in drug spend, split 11% brand-name and 89% generic by claim count, with an opioid prescribing rate of 1.4%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 84.2/100 for the 2023 performance year (Quality 65.1, Cost 60.6), compared with the national average of 83.1.
Geriatric Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 4,161 enrolled providers across 52 states and an average of 4,450 Part D claims per prescriber, so the context for interpreting these metrics differs meaningfully from a primary-care baseline.
Important: PlainDoctor is a directory of publicly available government data, not medical advice, a malpractice database, or a quality rating. Inclusion here does not imply a recommendation, and absence of complaints or sanctions on this page does not mean none exist, always verify credentials through the NPPES NPI Registry, your state medical board, and the ABMS or AOA before making healthcare decisions.
Practice Address
Provider Details
| NPI | 1346434578 |
|---|---|
| Specialty | Geriatric Medicine (Internal Medicine) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/30/2007 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
84.2228
Final Score
Avg: 83.1
65.1268
Quality
60.5737
Cost
Reporting: Individual
Industry payments received (2024) - CMS Open Payments transparency data
The federal Physician Payments Sunshine Act (part of the Affordable Care Act) requires drug and medical-device manufacturers + group purchasing organizations to publicly report payments and other transfers of value to physicians and teaching hospitals. The data below covers 2024 for Ilya Fishman, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$509
Largest payer
Exact Sciences Corporation
Most common payment type
Food and Beverage
Industry payments are not necessarily indicators of bias, they include research funding, consulting fees for evidence-based work, royalties for inventions, food at conferences, and similar items. The disclosure exists for transparency. Read our methodology for how we interpret this data.
License & disciplinary context - Illinois IDFPR 2023 annual report
Aggregate state board data only, NOT a determination of any individual provider's status. The figures below describe statewide disciplinary activity across all ~42K Illinois medical licensees in 2023 - they are NOT specific to Ilya Fishman, M.D.. To verify Ilya Fishman, M.D.'s current license status, search the IDFPR public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
106
Total board actions, Illinois 2023
Across 103 cases
2.52
Actions per 1,000 licensees
Illinois statewide rate
probation
Most common action type
38 cases
IDFPR publishes annual disciplinary statistics as part of public-record reporting under each state's Administrative Procedure Act. See the full breakdown by action type and year on the Illinois disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Ilya Fishman, M.D. - brand share 11.0%
Geriatric Medicine (Internal Medicine) Physician average
11% brand-name claims vs 89% generic, on 27,754 2023 Medicare Part D claims.
The federal Medicare Part D Generic Dispensing Rate national benchmark sits near 90% generic / 10% brand for primary-care prescribers, per CMS Office of the Actuary 2024 estimates. Higher brand share is common in specialty prescribing where generic equivalents are not available.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
27,754
Total Claims
$1.6M
Total Drug Cost
555
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 32,854
- Total Day Supply
- 777,401
- Brand vs Generic
- 11% brand / 89% generic
- Brand Drug Cost
- $1.1M
- Generic Drug Cost
- $458K
- Opioid Claims
- 396 (1.4% rate)
- Antibiotic Claims
- 570
Patient Demographics
- Average Patient Age
- 80.5 years
- Avg HCC Risk Score
- 2.01
- Gender Split
- 63% female / 37% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Ilya Fishman, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
1,661 claims
- Amlodipine Besylate
Amlodipine Besylate
1,022 claims
- Gabapentin
Gabapentin
1,003 claims
- Levothyroxine Sodium
Levothyroxine Sodium
979 claims
- Furosemide
Furosemide
819 claims
- Pantoprazole Sodium
Pantoprazole Sodium
765 claims
- Metoprolol Tartrate
Metoprolol Tartrate
713 claims
- Eliquis
Eliquis
681 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 1,661 |
| Amlodipine Besylate | 1,022 |
| Gabapentin | 1,003 |
| Levothyroxine Sodium | 979 |
| Furosemide | 819 |
| Pantoprazole Sodium | 765 |
| Metoprolol Tartrate | 713 |
| Eliquis Apixaban | 681 |
| Quetiapine Fumarate | 563 |
| Losartan Potassium | 548 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Geriatric Medicine (Internal Medicine) Physician in IL →
All providers in Illinois →
Compare specialties →
Geriatric Medicine (Internal Medicine) Physician Overview
How Ilya Fishman, M.D. fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.
4,161
Geriatric Medicine (Internal Medicine) Physician Providers in US
52
States with Geriatric Medicine (Internal Medicine) Physician
4,450
Avg Claims per Provider
Ilya Fishman, M.D.'s 27,754 claims are above the specialty average of 4,450.
Nearby Geriatric Medicine (Internal Medicine) Physician Providers in Illinois
Other clinicians with the same primary specialty enrolled in Illinois, drawn from the same CMS NPPES roster as Fishman.
Before you book an appointment
Use this federal record as your verification checklist, not as a recommendation.
- Confirm the NPI record is current in the official CMS registry, providers update their own NPPES details, and moves can lag. Verify this NPI
- Check the active license and any disciplinary history with the Illinois medical board, federal registration is not a license check. Credential verification guide
- Weigh a second option: compare this provider with a nearby Geriatric Medicine (Internal Medicine) Physician peer on Medicare volume and prescribing patterns. Compare providers
Medicare Part D and MIPS figures describe practice patterns in federal programs only, they are not quality ratings, and PlainDoctor does not rate, rank, or recommend providers.
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Frequently Asked Questions
What is Ilya Fishman, M.D.'s specialty? ▼
Ilya Fishman, M.D. specializes in Geriatric Medicine (Internal Medicine) Physician and practices in Elk Grove Village, Illinois. Credentials: M.D..
How much does Ilya Fishman, M.D. prescribe under Medicare Part D? ▼
In 2023, Ilya Fishman, M.D. wrote 27,754 Medicare Part D claims totaling $1.6M in drug costs for 555 beneficiaries.
What is Ilya Fishman, M.D.'s Medicare quality score? ▼
Ilya Fishman, M.D. has a CMS MIPS Final Score of 84.2/100 (Quality: 65.1, Cost: 60.6). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Ilya Fishman, M.D. located? ▼
Ilya Fishman, M.D. is located at 800 BIESTERFIELD RD, Elk Grove Village, IL, 60007. Phone: (847) 364-6724.
What is Ilya Fishman, M.D.'s NPI number? ▼
Ilya Fishman, M.D.'s National Provider Identifier (NPI) is 1346434578, issued on 08/30/2007.
Does Ilya Fishman, M.D. prescribe more brand-name or generic drugs? ▼
Ilya Fishman, M.D.'s prescribing is 11% brand-name and 89% generic drugs by claim count, with $1.1M in brand drug costs.
Does Ilya Fishman, M.D. prescribe opioids? ▼
Yes, Ilya Fishman, M.D. had 396 opioid claims in 2023 with an opioid prescribing rate of 1.4%.
How many Geriatric Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 4,161 Geriatric Medicine (Internal Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Internal Medicine) Physician provider writes 4,450 Medicare Part D claims per year.
What drugs does Ilya Fishman, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Ilya Fishman, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Gabapentin. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Ilya Fishman, M.D. accept Medicare? ▼
Ilya Fishman, M.D. appears in CMS Medicare data with 27,754 Part D claims and 555 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Ilya Fishman, M.D.'s credentials? ▼
Ilya Fishman, M.D.'s NPI is 1346434578 with credentials M.D.. You can verify this through the NPPES NPI Registry, check state medical board records, and confirm board certification through the ABMS or AOA.
Data Sources
View source datasets and methodology notes
- Provider Directory
- CMS National Plan and Provider Enumeration System (NPPES), download.cms.gov/nppes, updated monthly. Contains NPI, specialty, credentials, and practice location.
- Specialty Classification
- NUCC Health Care Provider Taxonomy (nucc.org), the industry standard for classifying provider specialties in Medicare and Medicaid billing.
- Prescribing Data
- CMS Medicare Part D Prescriber Public Use File (2023). Includes claims, drug costs, beneficiaries, and opioid prescribing rates.
- Quality Performance
- CMS Merit-based Incentive Payment System (MIPS) - 2023 performance year.
- Limitations
- Provider data is self-reported to CMS. Prescribing data reflects Medicare Part D only and does not include commercial insurance, Medicaid, or cash prescriptions. Claims below 11 beneficiaries are suppressed by CMS for privacy.
See our complete data methodology for details on how we collect and process government data.
Data as of April 2026 (NPPES) / 2023 (Medicare Part D). Source: Centers for Medicare & Medicaid Services (CMS).
Disclaimer: Data from CMS NPPES and Medicare Part D. PlainDoctor does not rate or rank providers. Provider information is self-reported and may not be current. Always verify information directly with the provider. About · Methodology
Compiled from official public sources by the PlainDoctor editorial team.