NPI registry status
Active
2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1477562718 M.D.
Verify on CMS → Isaac Gorbaty, M.D.
Geriatric Medicine (Internal Medicine) Physician in Tarzana, California.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 4,171 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
7K
Medicare Part D claims · 370 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
89%
generic claims · 10% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
47.4/100
▼ 36 pts below national avg 83.1 · Below average
Industry payments
$166.57
6 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
Isaac Gorbaty, M.D. reported a CMS MIPS final score of 47.4/100 - below the 83.1 national average - and filed 6,539 Medicare Part D claims in 2023.
- 47.4/100
- MIPS score · -36 vs avg
- 7K
- 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.
Isaac Gorbaty, 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
47 4th percentile higher than 4% 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 Isaac Gorbaty, 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, Isaac Gorbaty, M.D. writes more Part D claims than 73% of them and scores higher on MIPS quality than 9% - 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 Isaac Gorbaty, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Isaac Gorbaty, 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 Isaac Gorbaty, M.D.?
Below national averagePrimary specialty
Geriatric Medicine (Internal Medicine) Physician
Medicare Part D claims
6,539 47% vs specialty avg
MIPS final score
47.4/100 35.7 pts vs avg
Specialty distribution in California
How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Isaac Gorbaty, M.D.'s 2023 MIPS final score plotted against the Geriatric Medicine (Internal Medicine) Physician national average
- MIPS Final Score
- 47.4/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Geriatric Medicine (Internal Medicine) Physician) - 47.4/100 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).
Isaac Gorbaty, M.D. appears in the CMS NPPES registry as a Geriatric Medicine (Internal Medicine) Physician provider holding M.D. credentials at 18411 CLARK STREET, Tarzana, CA, 91356, with a listed phone of (818) 708-3143. NPI 1477562718 was issued on 08/05/2006.
Medicare Part D records for calendar year 2023 show 6,539 prescription claims written by this provider, covering 370 Medicare beneficiaries and totaling roughly $745K in drug spend, split 10% brand-name and 89% generic by claim count, with an opioid prescribing rate of 2.3%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 47.4/100 for the 2023 performance year (Quality 39.3, Cost 50.7), compared with the national average of 83.1.
Geriatric Medicine (Internal Medicine) Physician is a narrow specialty nationwide, with 4,171 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 | 1477562718 |
|---|---|
| Specialty | Geriatric Medicine (Internal Medicine) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 08/05/2006 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
47.4496
Final Score
Avg: 83.1
39.3227
Quality
50.7075
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 Isaac Gorbaty, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$167
Largest payer
Madrigal Pharmaceuticals
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 - California MBC 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 ~150K California medical licensees in 2023 - they are NOT specific to Isaac Gorbaty, M.D.. To verify Isaac Gorbaty, M.D.'s current license status, search the MBC public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
576
Total board actions, California 2023
Across 556 cases
3.84
Actions per 1,000 licensees
California statewide rate
probation
Most common action type
186 cases
MBC 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 California disciplinary trends page. Cross-checked against FSMB U.S. Medical Regulatory Trends.
Brand vs generic prescribing mix · Typical
Isaac Gorbaty, M.D. - brand share 10.0%
Geriatric Medicine (Internal Medicine) Physician average
10% brand-name claims vs 89% generic, on 6,539 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.
6,539
Total Claims
$745K
Total Drug Cost
370
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 12,574
- Total Day Supply
- 362,866
- Brand vs Generic
- 10% brand / 89% generic
- Brand Drug Cost
- $563K
- Generic Drug Cost
- $179K
- Opioid Claims
- 153 (2.3% rate)
- Antibiotic Claims
- 255
Patient Demographics
- Average Patient Age
- 74.9 years
- Avg HCC Risk Score
- 1.26
- Gender Split
- 57% female / 43% male
- Age Distribution
- <65: 22, 65-74: 179, 75-84: 116, 85+: 53
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Isaac Gorbaty, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
283 claims
- Levothyroxine Sodium
Levothyroxine Sodium
264 claims
- Amlodipine Besylate
Amlodipine Besylate
230 claims
- Losartan Potassium
Losartan Potassium
181 claims
- Metformin Hcl
Metformin Hcl
162 claims
- Omeprazole
Omeprazole
149 claims
- Alprazolam
Alprazolam
148 claims
- Furosemide
Furosemide
144 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 283 |
| Levothyroxine Sodium | 264 |
| Amlodipine Besylate | 230 |
| Losartan Potassium | 181 |
| Metformin Hcl | 162 |
| Omeprazole | 149 |
| Alprazolam | 148 |
| Furosemide | 144 |
| Potassium Chloride | 130 |
| Tamsulosin Hcl | 123 |
* 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 CA →
All providers in California →
Compare specialties →
Geriatric Medicine (Internal Medicine) Physician Overview
How Isaac Gorbaty, M.D. fits within the Geriatric Medicine (Internal Medicine) Physician landscape nationally.
4,171
Geriatric Medicine (Internal Medicine) Physician Providers in US
52
States with Geriatric Medicine (Internal Medicine) Physician
4,450
Avg Claims per Provider
Isaac Gorbaty, M.D.'s 6,539 claims are above the specialty average of 4,450.
Nearby Geriatric Medicine (Internal Medicine) Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Gorbaty.
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 California 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 Isaac Gorbaty, M.D.'s specialty? ▼
Isaac Gorbaty, M.D. specializes in Geriatric Medicine (Internal Medicine) Physician and practices in Tarzana, California. Credentials: M.D..
How much does Isaac Gorbaty, M.D. prescribe under Medicare Part D? ▼
In 2023, Isaac Gorbaty, M.D. wrote 6,539 Medicare Part D claims totaling $745K in drug costs for 370 beneficiaries.
What is Isaac Gorbaty, M.D.'s Medicare quality score? ▼
Isaac Gorbaty, M.D. has a CMS MIPS Final Score of 47.4/100 (Quality: 39.3, Cost: 50.7). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Isaac Gorbaty, M.D. located? ▼
Isaac Gorbaty, M.D. is located at 18411 CLARK STREET, Tarzana, CA, 91356. Phone: (818) 708-3143.
What is Isaac Gorbaty, M.D.'s NPI number? ▼
Isaac Gorbaty, M.D.'s National Provider Identifier (NPI) is 1477562718, issued on 08/05/2006.
Does Isaac Gorbaty, M.D. prescribe more brand-name or generic drugs? ▼
Isaac Gorbaty, M.D.'s prescribing is 10% brand-name and 89% generic drugs by claim count, with $563K in brand drug costs.
Does Isaac Gorbaty, M.D. prescribe opioids? ▼
Yes, Isaac Gorbaty, M.D. had 153 opioid claims in 2023 with an opioid prescribing rate of 2.3%.
How many Geriatric Medicine (Internal Medicine) Physician providers are there in the US? ▼
There are 4,171 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 Isaac Gorbaty, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Isaac Gorbaty, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Levothyroxine Sodium, Amlodipine Besylate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Isaac Gorbaty, M.D. accept Medicare? ▼
Isaac Gorbaty, M.D. appears in CMS Medicare data with 6,539 Part D claims and 370 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Isaac Gorbaty, M.D.'s credentials? ▼
Isaac Gorbaty, M.D.'s NPI is 1477562718 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of May 2026.