NPI registry status
Active
2026 NPPES data Urology Physician NPI 1063943439 MD
Verify on CMS → Andrew Tam, MD
Urology Physician in Oakland, 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 13,606 in Urology 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 · 194 beneficiaries · Urology Physician avg: 1K
Industry payments
$112.68
2 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Andrew Tam, MD filed 745 Medicare Part D claims in 2024 as a Urology Physician in Oakland, California.
- 745
- Part D claims, 2024
- Likely
- board-certified (heuristic)
- ≥70th
- 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.
Federal trust snapshot
What official records show about Andrew Tam, MD
Federal records show an active NPI with Medicare Part D prescribing activity — verifiable registry data, not a proprietary rating.
- Verified
NPI registry status
Active listing in the CMS National Provider Identifier Registry (NPI 1063943439), first enumerated 03/27/2017.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 745 Medicare Part D prescription claims in the 2023 CMS public use file — indicates active Medicare prescribing participation.
Source: CMS Part D Prescriber PUF
- Reported
Board certification signal
Heuristic suggests board-certified status based on ABMS-eligible specialty taxonomy plus active CMS participation signals — not a direct ABMS verification.
- Reported
Hospital affiliations
1 CMS Care Compare hospital affiliation on record — practice footprint from the Doctors and Clinicians file.
Source: CMS Care Compare
- Reported
Industry payment transparency
$112.68 in reported industry payments (2 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- State context
State board disciplinary context
California statewide board action statistics are published annually — these figures describe aggregate state activity, not Andrew Tam, MD's individual license status. Verify directly with the state medical board.
Source: MBC annual report 2023
- Not in federal data
Individual sanction lookup
PlainDoctor does not publish per-provider disciplinary determinations. Confirm current license and any individual actions through the state medical board or FSMB verification service.
Source: State medical board / FSMB
This trust snapshot summarizes only what appears in federal CMS/NPPES public records. It is not a composite score, star rating, patient review, or clinical recommendation. PlainDoctor never fabricates reviews or AggregateRating schema.
CMS NPPES provider registry desk
NPI 1063943439 · Urology Physician
NPI-10 · ENUM-RECENT · TAX-MID · RX-LIGHT · BOOK-LIGHT · PHOTO-ENUM
- NPI-10 1063943439
- ENUM-RECENT 2017
- TAX-MID 14K Urology Physician
- RX-LIGHT 745
- BOOK-LIGHT 1,421 in California
- PHOTO-ENUM Jonathan Demeter, MD · 2017
Andrew Tam, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2024, across all CMS prescribers nationally
745 ≥ 70th percentile 70% of 1,416,883 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 · 2024
✓
Board certification likely (heuristic, not verified)
Andrew Tam, MD practices in an ABMS-board-eligible specialty and shows active CMS Medicare participation + 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 Andrew Tam, MD?
Quality data not reportedPrimary specialty
Urology Physician
Medicare Part D claims
745 45% vs specialty avg
Specialty distribution in California
How Urology 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 Urology 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).
Practice Address
Provider Details
| NPI | 1063943439 |
|---|---|
| Specialty | Urology Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 03/27/2017 |
Hospital and facility affiliations
Facilities where Andrew Tam, MD 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.
Sutter Bay Medical Foundation
Orinda, 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 Andrew Tam, MD. Source: openpaymentsdata.cms.gov.
Total received
$113
Largest payer
Boston Scientific 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 - 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 Andrew Tam, MD. To verify Andrew Tam, MD'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 2024.
745
Total Claims
$21K
Total Drug Cost
194
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 1,179.4
- Total Day Supply
- 30,671
- Generic Drug Cost
- $17K
- Opioid Claims
- 25 (3.4% rate)
- Antibiotic Claims
- 122
Patient Demographics
- Average Patient Age
- 75.0 years
- Avg HCC Risk Score
- 1.23
- Gender Split
- 27% female / 73% male
- Age Distribution
- <65: 11, 65-74: 84, 75-84: 75, 85+: 24
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2024. Based on Medicare Part D data only.
What Andrew Tam, MD prescribes most
Top Medicare Part D drugs by claim count, 2024
- Tamsulosin Hcl
Tamsulosin Hcl
190 claims
- Finasteride
Finasteride
158 claims
- Solifenacin Succin…
Solifenacin Succinate
103 claims
- Levofloxacin 40
Levofloxacin
40 claims
- Cephalexin 31
Cephalexin
31 claims
- Ibuprofen 27
Ibuprofen
27 claims
- Sulfamethoxazole-T… 25
Sulfamethoxazole-Trimethoprim
25 claims
- Oxycodone Hcl 22
Oxycodone Hcl
22 claims
| Drug | Claims |
|---|---|
| Tamsulosin Hcl | 190 |
| Finasteride | 158 |
| Solifenacin Succinate | 103 |
| Levofloxacin | 40 |
| Cephalexin | 31 |
| Ibuprofen | 27 |
| Sulfamethoxazole-Trimethoprim Sulfamethoxazole/Trimethoprim | 25 |
| Oxycodone Hcl | 22 |
| Methenamine Hippurate | 19 |
| Oxybutynin Chloride Er Oxybutynin Chloride | 18 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
Urology Physician Overview
How Andrew Tam, MD fits within the Urology Physician landscape nationally.
13,606
Urology Physician Providers in US
54
States with Urology Physician
1,354
Avg Claims per Provider
Andrew Tam, MD's 745 claims are below the specialty average of 1,354.
Nationwide Urology Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Tam, both outside California so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2017)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Urology Physician Providers in California
Other clinicians with the same primary specialty enrolled in California, drawn from the same CMS NPPES roster as Tam.
One of 1,421 Urology Physician providers enrolled in California, 5 are shown here.
Dr. David Aaronson
MD
Oakland, CA
Dr. Jason Abber
MD
Panorama City, CA
Dr. Marc Abboud
MD
Los Alamitos, CA
George Abdelsayed
Anaheim, CA
Garen Abedi
Downey, CA
Compare Urology Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Andrew Tam, MD's specialty? ▼
Andrew Tam, MD specializes in Urology Physician and practices in Oakland, California. Credentials: MD.
How much does Andrew Tam, MD prescribe under Medicare Part D? ▼
In 2024, Andrew Tam, MD wrote 745 Medicare Part D claims totaling $21K in drug costs for 194 beneficiaries.
Where is Andrew Tam, MD located? ▼
Andrew Tam, MD is located at 350 30TH ST STE 100, Oakland, CA, 94609. Phone: (510) 204-8168.
What is Andrew Tam, MD's NPI number? ▼
Andrew Tam, MD's National Provider Identifier (NPI) is 1063943439, issued on 03/27/2017.
Does Andrew Tam, MD prescribe opioids? ▼
Yes, Andrew Tam, MD had 25 opioid claims in 2024 with an opioid prescribing rate of 3.4%.
How many Urology Physician providers are there in the US? ▼
There are 13,606 Urology Physician providers across 54 states in the US. The average Urology Physician provider writes 1,354 Medicare Part D claims per year.
What drugs does Andrew Tam, MD prescribe most often? ▼
Based on 2024 Medicare Part D data, Andrew Tam, MD's most frequently prescribed drugs include Tamsulosin Hcl, Finasteride, Solifenacin Succinate. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Andrew Tam, MD accept Medicare? ▼
Andrew Tam, MD appears in CMS Medicare data with 745 Part D claims and 194 Medicare beneficiaries in 2024. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Andrew Tam, MD's credentials? ▼
Andrew Tam, MD's NPI is 1063943439 with credentials MD. 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 (2024). 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 August 2026 (NPPES) / 2024 (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 August 2026.