NPI registry status
Active
2026 NPPES data Medical Oncology Physician NPI 1477907715 M.D.
Verify on CMS → Adam Rock, M.D.
Medical Oncology Physician in Duarte, 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 3,815 in Medical Oncology 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
745
Medicare Part D claims · 121 beneficiaries · Medical Oncology Physician avg: 689
Generic prescribing
48%
generic claims · 52% brand-name · higher generic rates reduce patient out-of-pocket costs
MIPS score
99.1/100
▲ 16 pts above national avg 83.1 · Exceptional
Industry payments
$242.07
5 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
Adam Rock, M.D. reported a CMS MIPS final score of 99.1/100 - above the 83.1 national average - and filed 745 Medicare Part D claims in 2023.
- 99.1/100
- MIPS score · +16 vs avg
- 745
- Part D claims, 2023
- 48%
- 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.
Adam Rock, 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
99 Top 9% higher than 91% 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 Adam Rock, M.D. sits
This provider among medical oncology physician peers
Across the 1,527 medical oncology physician providers who report both Medicare Part D prescribing and a MIPS quality score, Adam Rock, M.D. writes more Part D claims than 63% of them and scores higher on MIPS quality than 91% - placing this provider in the high-volume, high-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 medical oncology physician peer from a representative sample of 60; the gold marker is Adam Rock, M.D.. Source: CMS Medicare Part D Prescriber data and the CMS Merit-based Incentive Payment System, 2023.
✓
Board certification likely (heuristic, not verified)
Adam Rock, M.D. practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + MIPS quality reporting + 1 hospital affiliation - 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 Adam Rock, M.D.?
High performer (top quartile)Primary specialty
Medical Oncology Physician
Medicare Part D claims
745 8% vs specialty avg
MIPS final score
99.1/100 16 pts vs avg
Specialty distribution in California
How Medical Oncology Physician compares to other specialties among California providers
Medicare quality performance, MIPS
Adam Rock, M.D.'s 2023 MIPS final score plotted against the Medical Oncology Physician national average
- MIPS Final Score
- 99.1/100
- vs 83.1 national avg · 2023 performance year
MIPS final score (Medical Oncology Physician) - 99.1/100 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).
Adam Rock, M.D. appears in the CMS NPPES registry as a Medical Oncology Physician provider holding M.D. credentials at 1500 DUARTE RD, Duarte, CA, 91010, with a listed phone of (626) 256-4673. NPI 1477907715 was issued on 04/22/2016.
Medicare Part D records for calendar year 2023 show 745 prescription claims written by this provider, covering 121 Medicare beneficiaries and totaling roughly $6.4 million in drug spend, split 52% brand-name and 48% generic by claim count, with an opioid prescribing rate of 2.1%. On the CMS Merit-based Incentive Payment System, this provider earned a Final Score of 99.1/100 for the 2023 performance year (Quality 85.2), compared with the national average of 83.1.
Medical Oncology Physician is a narrow specialty nationwide, with 3,815 enrolled providers across 53 states and an average of 689 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 | 1477907715 |
|---|---|
| Specialty | Medical Oncology Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 04/22/2016 |
CMS Quality Score (MIPS)
Merit-based Incentive Payment System (MIPS) scores from CMS, 2023 performance year.
99.1275
Final Score
Avg: 83.1
85.2396
Quality
100
Promoting Interoperability
Reporting: Group practice
Hospital and facility affiliations
Facilities where Adam Rock, M.D. bills Medicare from. Star ratings (1-5) are CMS Hospital Compare's "Hospital overall rating" - a composite of mortality, readmission, patient experience, safety, timely care, and efficient use of medical imaging measures. Source: CMS Care Compare.
City OF Hope Medical Foundation
Duarte, CA
Affiliations sourced from CMS Doctors and Clinicians National Downloadable File; hospital ratings from CMS Hospital General Information dataset (cross-referenced by facility name + state).
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 Adam Rock, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$242
Largest payer
Novocure Inc.
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 Adam Rock, M.D.. To verify Adam Rock, 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 · Brand-heavy
Adam Rock, M.D. - brand share 52.0%
Medical Oncology Physician average
52% brand-name claims vs 48% generic, on 745 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.
745
Total Claims
$6.4M
Total Drug Cost
121
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 815
- Total Day Supply
- 21,231
- Brand vs Generic
- 52% brand / 48% generic
- Brand Drug Cost
- $6.2M
- Generic Drug Cost
- $235K
- Opioid Claims
- 16 (2.1% rate)
- Antibiotic Claims
- 15
Patient Demographics
- Average Patient Age
- 73.3 years
- Avg HCC Risk Score
- 2.72
- Gender Split
- 40% female / 60% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Adam Rock, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Tagrisso
Tagrisso
178 claims
- Ondansetron Hcl 41
Ondansetron Hcl
41 claims
- Abiraterone Acetate 38
Abiraterone Acetate
38 claims
- Alecensa 36
Alecensa
36 claims
- Prochlorperazine M… 36
Prochlorperazine Maleate
36 claims
- Prednisone 29
Prednisone
29 claims
- Dexamethasone 27
Dexamethasone
27 claims
- Orgovyx 26
Orgovyx
26 claims
| Drug | Claims |
|---|---|
| Tagrisso Osimertinib Mesylate | 178 |
| Ondansetron Hcl | 41 |
| Abiraterone Acetate | 38 |
| Alecensa Alectinib Hcl | 36 |
| Prochlorperazine Maleate | 36 |
| Prednisone | 29 |
| Dexamethasone | 27 |
| Orgovyx Relugolix | 26 |
| Xtandi Enzalutamide | 19 |
| Lorbrena Lorlatinib | 16 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Medical Oncology Physician Overview
How Adam Rock, M.D. fits within the Medical Oncology Physician landscape nationally.
3,815
Medical Oncology Physician Providers in US
53
States with Medical Oncology Physician
689
Avg Claims per Provider
Adam Rock, M.D.'s 745 claims are above the specialty average of 689.
Nearby Medical Oncology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Rock.
Dr. Ranjana Advani
MD
Stanford, CA
Dr. Kambiz Afrasiabi
M.D.
Anaheim, CA
Dr. Mark Agulnik
MD
Los Angeles, CA
Dr. Weiyun Ai
MD
San Francisco, CA
Dr. Shafqat Akhtar
MD
Red Bluff, CA
Compare Medical Oncology Physician nationally: see state-by-state distribution →
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 Medical Oncology 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 Adam Rock, M.D.'s specialty? ▼
Adam Rock, M.D. specializes in Medical Oncology Physician and practices in Duarte, California. Credentials: M.D..
How much does Adam Rock, M.D. prescribe under Medicare Part D? ▼
In 2023, Adam Rock, M.D. wrote 745 Medicare Part D claims totaling $6.4M in drug costs for 121 beneficiaries.
What is Adam Rock, M.D.'s Medicare quality score? ▼
Adam Rock, M.D. has a CMS MIPS Final Score of 99.1/100 (Quality: 85.2). The national average MIPS Final Score is 83.1. Source: CMS Merit-based Incentive Payment System (MIPS) 2023.
Where is Adam Rock, M.D. located? ▼
Adam Rock, M.D. is located at 1500 DUARTE RD, Duarte, CA, 91010. Phone: (626) 256-4673.
What is Adam Rock, M.D.'s NPI number? ▼
Adam Rock, M.D.'s National Provider Identifier (NPI) is 1477907715, issued on 04/22/2016.
Does Adam Rock, M.D. prescribe more brand-name or generic drugs? ▼
Adam Rock, M.D.'s prescribing is 52% brand-name and 48% generic drugs by claim count, with $6.2M in brand drug costs.
Does Adam Rock, M.D. prescribe opioids? ▼
Yes, Adam Rock, M.D. had 16 opioid claims in 2023 with an opioid prescribing rate of 2.1%.
How many Medical Oncology Physician providers are there in the US? ▼
There are 3,815 Medical Oncology Physician providers across 53 states in the US. The average Medical Oncology Physician provider writes 689 Medicare Part D claims per year.
What drugs does Adam Rock, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Adam Rock, M.D.'s most frequently prescribed drugs include Tagrisso, Ondansetron Hcl, Abiraterone Acetate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Adam Rock, M.D. accept Medicare? ▼
Adam Rock, M.D. appears in CMS Medicare data with 745 Part D claims and 121 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Adam Rock, M.D.'s credentials? ▼
Adam Rock, M.D.'s NPI is 1477907715 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.