NPI registry status
Active
2026 NPPES data Geriatric Medicine (Family Medicine) Physician NPI 1114952835 M.D.
Verify on CMS → Robert Tan, M.D.
Geriatric Medicine (Family Medicine) Physician in Houston, Texas.
This profile is drawn from the federal National Provider Identifier Registry (CMS NPPES), which lists more than 7 million U.S. healthcare providers - including 1,787 in Geriatric Medicine (Family 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
123
Medicare Part D claims · 12 beneficiaries · Geriatric Medicine (Family Medicine) Physician avg: 5K
Industry payments
$124.28
1 payments · CMS Open Payments (Sunshine Act)
What the federal data shows
Robert Tan, M.D. filed 123 Medicare Part D claims in 2023 as a Geriatric Medicine (Family Medicine) Physician in Houston, Texas.
- 123
- Part D claims, 2023
- $124.28
- industry payments (Sunshine Act)
- ≥35th
- 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.
CMS NPPES provider registry desk
NPI 1114952835 · Geriatric Medicine (Family Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-LIGHT · BOOK-THIN · PHOTO-ENUM
- NPI-10 1114952835
- ENUM-LEGACY 2006
- TAX-NARROW 1,787
- RX-LIGHT 123
- BOOK-THIN 152 in Texas
- PHOTO-ENUM Carl Wyne · 2006
Robert Tan, M.D.'s Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
123 ≥ 35th percentile 35% 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)
Robert Tan, 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 Robert Tan, M.D.?
Quality data not reportedPrimary specialty
Geriatric Medicine (Family Medicine) Physician
Medicare Part D claims
123 97% vs specialty avg
Specialty distribution in Texas
How Geriatric Medicine (Family Medicine) Physician compares to other specialties among Texas 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 (Family 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).
Practice Address
Provider Details
| NPI | 1114952835 |
|---|---|
| Specialty | Geriatric Medicine (Family Medicine) Physician |
| Credentials | M.D. |
| Gender | Male |
| NPI Issued | 07/11/2006 |
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 Robert Tan, M.D.. Source: openpaymentsdata.cms.gov.
Total received
$124
Largest payer
E.R. Squibb & Sons, L.L.C.
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 - Texas TMB 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 ~77K Texas medical licensees in 2023 - they are NOT specific to Robert Tan, M.D.. To verify Robert Tan, M.D.'s current license status, search the TMB public license lookup directly, or check the Federation of State Medical Boards (FSMB) verification service.
344
Total board actions, Texas 2023
Across 334 cases
4.47
Actions per 1,000 licensees
Texas statewide rate
probation
Most common action type
94 cases
TMB 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 Texas 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.
123
Total Claims
$12K
Total Drug Cost
12
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 256
- Total Day Supply
- 7,651
- Generic Drug Cost
- $3K
Patient Demographics
- Average Patient Age
- 75.5 years
- Avg HCC Risk Score
- 0.96
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
| Drug | Claims |
|---|---|
| Testosterone | 21 |
* Counts below 11 are suppressed by CMS for patient privacy. Generic names shown where available from CMS Part D data.
More Geriatric Medicine (Family Medicine) Physician in TX →
All providers in Texas →
Compare specialties →
Geriatric Medicine (Family Medicine) Physician Overview
How Robert Tan, M.D. fits within the Geriatric Medicine (Family Medicine) Physician landscape nationally.
1,787
Geriatric Medicine (Family Medicine) Physician Providers in US
52
States with Geriatric Medicine (Family Medicine) Physician
4,854
Avg Claims per Provider
Robert Tan, M.D.'s 123 claims are below the specialty average of 4,854.
Nationwide Geriatric Medicine (Family Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Tan, both outside Texas so the neighborhoods are not geographic containment.
Same NPPES enumeration year (2006)
Same-specialty clinicians who entered the NPI registry in the same calendar year, outside this state.
Nearby Geriatric Medicine (Family Medicine) Physician Providers in Texas
Other clinicians with the same primary specialty enrolled in Texas, drawn from the same CMS NPPES roster as Tan.
One of 152 Geriatric Medicine (Family Medicine) Physician providers enrolled in Texas, 5 are shown here.
Dr. Ahmad Abazid
M.D
Richardson, TX
Dr. Shekher Adolph
M.D.
San Antonio, TX
Dr. Raul Aguilar
M.D.
Lackland Afb, TX
Dr. Asma Ahmad
MD
Cypress, TX
Dr. Saamia Ahmed
M.D.
Irving, TX
Compare Geriatric Medicine (Family Medicine) Physician nationally: see state-by-state distribution →
Frequently Asked Questions
What is Robert Tan, M.D.'s specialty? ▼
Robert Tan, M.D. specializes in Geriatric Medicine (Family Medicine) Physician and practices in Houston, Texas. Credentials: M.D..
How much does Robert Tan, M.D. prescribe under Medicare Part D? ▼
In 2023, Robert Tan, M.D. wrote 123 Medicare Part D claims totaling $12K in drug costs for 12 beneficiaries.
Where is Robert Tan, M.D. located? ▼
Robert Tan, M.D. is located at 3311 RICHMOND AVE STE 205, Houston, TX, 77098. Phone: (713) 401-9396.
What is Robert Tan, M.D.'s NPI number? ▼
Robert Tan, M.D.'s National Provider Identifier (NPI) is 1114952835, issued on 07/11/2006.
How many Geriatric Medicine (Family Medicine) Physician providers are there in the US? ▼
There are 1,787 Geriatric Medicine (Family Medicine) Physician providers across 52 states in the US. The average Geriatric Medicine (Family Medicine) Physician provider writes 4,854 Medicare Part D claims per year.
What drugs does Robert Tan, M.D. prescribe most often? ▼
Based on 2023 Medicare Part D data, Robert Tan, M.D.'s most frequently prescribed drugs include Testosterone. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Robert Tan, M.D. accept Medicare? ▼
Robert Tan, M.D. appears in CMS Medicare data with 123 Part D claims and 12 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Robert Tan, M.D.'s credentials? ▼
Robert Tan, M.D.'s NPI is 1114952835 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
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.