NPI registry status
Active
2026 NPPES data Adult Medicine Physician NPI 1841220209 M.D.
Verify on CMS → John Andrew, M.D.
Adult Medicine Physician in Greenbrae, 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 2,481 in Adult 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
4K
Medicare Part D claims · 351 beneficiaries · Adult Medicine Physician avg: 3K
Generic prescribing
90%
generic claims · 9% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$15.47
1 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
John Andrew, M.D. filed 3,542 Medicare Part D claims in 2023 as a Adult Medicine Physician in Greenbrae, California, prescribing 90% generic.
- 4K
- Part D claims, 2023
- 90%
- generic prescribing
- $15.47
- industry payments (Sunshine Act)
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.
John Andrew, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
3,542 Top 10% higher than 90% of 1,370,886 prescribers
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.
Source CMS Medicare Part D Prescriber Public Use File · 2023
◑
Board-eligible specialty (heuristic, not verified)
John Andrew, M.D. 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 John Andrew, M.D.?
Quality data not reportedPrimary specialty
Adult Medicine Physician
Medicare Part D claims
3,542 26% vs specialty avg
Specialty distribution in California
How Adult 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 Adult 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).
John Andrew, M.D. appears in the CMS NPPES registry as a Adult Medicine Physician provider holding M.D. credentials at 599 SIR FRANCES DRAKE BLVD, Greenbrae, CA, 94904, with a listed phone of (415) 925-1523. NPI 1841220209 was issued on 07/03/2006.
Medicare Part D records for calendar year 2023 show 3,542 prescription claims written by this provider, covering 351 Medicare beneficiaries and totaling roughly $321K in drug spend, split 9% brand-name and 90% generic by claim count, with an opioid prescribing rate of 1.3%.
Adult Medicine Physician is a narrow specialty nationwide, with 2,481 enrolled providers across 52 states and an average of 2,807 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 | 1841220209 |
|---|---|
| Specialty | Adult Medicine Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/03/2006 |
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 John Andrew, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$15
Largest payer
Novo Nordisk 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 John Andrew, M.D.. To verify John Andrew, 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 · Generic-heavy
John Andrew, M.D. - brand share 9.0%
Adult Medicine Physician average
9% brand-name claims vs 90% generic, on 3,542 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.
3,542
Total Claims
$321K
Total Drug Cost
351
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 8,694
- Total Day Supply
- 255,844
- Brand vs Generic
- 9% brand / 90% generic
- Brand Drug Cost
- $258K
- Generic Drug Cost
- $62K
- Opioid Claims
- 47 (1.3% rate)
- Antibiotic Claims
- 50
Patient Demographics
- Average Patient Age
- 76.6 years
- Avg HCC Risk Score
- 0.92
- Gender Split
- 41% female / 59% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What John Andrew, M.D. prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
326 claims
- Amlodipine Besylate
Amlodipine Besylate
218 claims
- Levothyroxine Sodium
Levothyroxine Sodium
201 claims
- Losartan Potassium
Losartan Potassium
154 claims
- Lisinopril
Lisinopril
148 claims
- Lorazepam 116
Lorazepam
116 claims
- Hydrochlorothiazide 106
Hydrochlorothiazide
106 claims
- Metoprolol Succinate 95
Metoprolol Succinate
95 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 326 |
| Amlodipine Besylate | 218 |
| Levothyroxine Sodium | 201 |
| Losartan Potassium | 154 |
| Lisinopril | 148 |
| Lorazepam | 116 |
| Hydrochlorothiazide | 106 |
| Metoprolol Succinate | 95 |
| Tamsulosin Hcl | 85 |
| Gabapentin | 80 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Adult Medicine Physician Overview
How John Andrew, M.D. fits within the Adult Medicine Physician landscape nationally.
2,481
Adult Medicine Physician Providers in US
52
States with Adult Medicine Physician
2,807
Avg Claims per Provider
John Andrew, M.D.'s 3,542 claims are above the specialty average of 2,807.
Nearby Adult Medicine Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Andrew.
Dr. Mina Abazari
M.D.
San Juan Capistrano, CA
Dr. Derrick Adams
D.O.
Lincoln, CA
Dr. Abhishek Agarwal
M.D.
Roseville, CA
Dr. Marie Agleham
MD
Union City, CA
Dr. Ahmad Ahmadzia
M.D.
Fair Oaks, CA
Compare Adult Medicine 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 Adult 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.
Healthcare Guides
Learn more about finding, verifying, and understanding healthcare providers.
How to Find a Doctor
Step-by-step guide to choosing a provider
Verify Credentials
Check NPI, board certification & license status
Medical Specialties Explained
Who treats what and how specialties differ
Understanding Medicare Claims Data
What prescribing data reveals about a provider
In-Network vs Out-of-Network
How insurance networks affect your costs
Telehealth Guide
Virtual care options and coverage in 2026
Explore California
Frequently Asked Questions
What is John Andrew, M.D.'s specialty? ▼
John Andrew, M.D. specializes in Adult Medicine Physician and practices in Greenbrae, California. Credentials: M.D..
How much does John Andrew, M.D. prescribe under Medicare Part D? ▼
In 2023, John Andrew, M.D. wrote 3,542 Medicare Part D claims totaling $321K in drug costs for 351 beneficiaries.
Where is John Andrew, M.D. located? ▼
John Andrew, M.D. is located at 599 SIR FRANCES DRAKE BLVD, Greenbrae, CA, 94904. Phone: (415) 925-1523.
What is John Andrew, M.D.'s NPI number? ▼
John Andrew, M.D.'s National Provider Identifier (NPI) is 1841220209, issued on 07/03/2006.
Does John Andrew, M.D. prescribe more brand-name or generic drugs? ▼
John Andrew, M.D.'s prescribing is 9% brand-name and 90% generic drugs by claim count, with $258K in brand drug costs.
Does John Andrew, M.D. prescribe opioids? ▼
Yes, John Andrew, M.D. had 47 opioid claims in 2023 with an opioid prescribing rate of 1.3%.
How many Adult Medicine Physician providers are there in the US? ▼
There are 2,481 Adult Medicine Physician providers across 52 states in the US. The average Adult Medicine Physician provider writes 2,807 Medicare Part D claims per year.
What drugs does John Andrew, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, John Andrew, M.D.'s most frequently prescribed drugs include Atorvastatin Calcium, Amlodipine Besylate, Levothyroxine Sodium. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does John Andrew, M.D. accept Medicare? ▼
John Andrew, M.D. appears in CMS Medicare data with 3,542 Part D claims and 351 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify John Andrew, M.D.'s credentials? ▼
John Andrew, M.D.'s NPI is 1841220209 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.
- 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.