NPI registry status
Active
2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1396233185
Verify on CMS → Caroline Petrossian
Geriatric Medicine (Internal Medicine) Physician in Century City, 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
373
Medicare Part D claims · 18 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
What the federal data shows
Caroline Petrossian filed 373 Medicare Part D claims in 2023 as a Geriatric Medicine (Internal Medicine) Physician in Century City, California.
- 373
- Part D claims, 2023
- ≥57th
- pct by Part D claim volume (lower-bound band)
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.
Caroline Petrossian's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
373 ≥ 57th percentile 57% of 1,370,886 prescribers are in lower value bands
Each bar is a band; taller bars hold more prescribers. 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.
The percentile is a conservative 100-claim band: it counts only prescribers in lower claim-volume bands. Medicare Part D claim volume is activity context, not a quality measure or recommendation. See methodology § corpus placement.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
Caroline Petrossian practices in an ABMS-board-eligible specialty but we don't have enough CMS-participation signals to confirm active board-certified status. Consult CertificationMatters.org (the official ABMS public lookup).
What does the federal data show about Caroline Petrossian?
Quality data not reportedPrimary specialty
Geriatric Medicine (Internal Medicine) Physician
Medicare Part D claims
373 92% vs specialty avg
Specialty distribution in California
How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among California providers
Board certification
Not published by CMS
CMS does not publish a per-provider board-certification field in NPPES. PlainDoctor does not have a reliable per-specialty certification rate to show for Geriatric Medicine (Internal Medicine) Physician. Verify directly:
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).
Caroline Petrossian appears in the CMS NPPES registry as a Geriatric Medicine (Internal Medicine) Physician provider at 1880 CENTURY PARK EAST SUITE 711, Century City, CA, 90067, with a listed phone of (818) 568-4110. NPI 1396233185 was issued on 04/26/2018.
Medicare Part D records for calendar year 2023 show 373 prescription claims written by this provider, covering 18 Medicare beneficiaries and totaling roughly $25K in drug spend.
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 | 1396233185 |
|---|---|
| Specialty | Geriatric Medicine (Internal Medicine) Physician |
| Gender | Female |
| NPI Issued | 04/26/2018 |
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 Caroline Petrossian. To verify Caroline Petrossian'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.
Medicare Part D Prescribing Data
CMS Medicare Part D prescriber-level data for calendar year 2023.
373
Total Claims
$25K
Total Drug Cost
18
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 387
- Total Day Supply
- 9,418
- Generic Drug Cost
- $14K
Patient Demographics
- Average Patient Age
- 76.7 years
- Avg HCC Risk Score
- 2.44
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Caroline Petrossian prescribes most
Top Medicare Part D drugs by claim count, 2023
- Tamsulosin Hcl
Tamsulosin Hcl
32 claims
- Eliquis
Eliquis
24 claims
- Warfarin Sodium
Warfarin Sodium
23 claims
- Levothyroxine Sodium
Levothyroxine Sodium
20 claims
- Allopurinol
Allopurinol
15 claims
- Chlorhexidine Gluc…
Chlorhexidine Gluconate
15 claims
- Gabapentin
Gabapentin
15 claims
- Memantine Hcl
Memantine Hcl
15 claims
| Drug | Claims |
|---|---|
| Tamsulosin Hcl | 32 |
| Eliquis Apixaban | 24 |
| Warfarin Sodium | 23 |
| Levothyroxine Sodium | 20 |
| Allopurinol | 15 |
| Chlorhexidine Gluconate | 15 |
| Gabapentin | 15 |
| Memantine Hcl | 15 |
| Atorvastatin Calcium | 13 |
| Citalopram Hbr Citalopram Hydrobromide | 13 |
* 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 Caroline Petrossian 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
Caroline Petrossian's 373 claims are below 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 Petrossian.
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 Caroline Petrossian's specialty? ▼
Caroline Petrossian specializes in Geriatric Medicine (Internal Medicine) Physician and practices in Century City, California.
How much does Caroline Petrossian prescribe under Medicare Part D? ▼
In 2023, Caroline Petrossian wrote 373 Medicare Part D claims totaling $25K in drug costs for 18 beneficiaries.
Where is Caroline Petrossian located? ▼
Caroline Petrossian is located at 1880 CENTURY PARK EAST SUITE 711, Century City, CA, 90067. Phone: (818) 568-4110.
What is Caroline Petrossian's NPI number? ▼
Caroline Petrossian's National Provider Identifier (NPI) is 1396233185, issued on 04/26/2018.
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 Caroline Petrossian prescribe most often? ▼
Based on 2023 Medicare Part D data, Caroline Petrossian's most frequently prescribed drugs include Tamsulosin Hcl, Eliquis, Warfarin Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Caroline Petrossian accept Medicare? ▼
Caroline Petrossian appears in CMS Medicare data with 373 Part D claims and 18 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Caroline Petrossian's credentials? ▼
Caroline Petrossian's NPI is 1396233185. 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.
- 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
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.