NPI registry status
Active
2026 NPPES data Geriatric Medicine (Internal Medicine) Physician NPI 1295894426 MD
Verify on CMS → Thomas Obisesan, MD
Geriatric Medicine (Internal Medicine) Physician in Washington, District of Columbia.
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
2K
Medicare Part D claims · 53 beneficiaries · Geriatric Medicine (Internal Medicine) Physician avg: 4K
Generic prescribing
92%
generic claims · 8% brand-name · higher generic rates reduce patient out-of-pocket costs
Industry payments
$21.0K
28 payments · CMS Open Payments (Sunshine Act)
Source: CMS Medicare Part D Prescriber Public Use File, 2023
What the federal data shows
Thomas Obisesan, MD filed 1,652 Medicare Part D claims in 2023 as a Geriatric Medicine (Internal Medicine) Physician in Washington, District of Columbia, prescribing 92% generic.
- 2K
- Part D claims, 2023
- 92%
- generic prescribing
- Likely
- board-certified (heuristic)
- ≥82nd
- 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 Thomas Obisesan, 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 1295894426), first enumerated 12/06/2006.
Source: CMS NPPES
- Reported
Medicare Part D participation
Filed 1,652 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
$21.0K in reported industry payments (28 transfers) in 2024 under the federal Sunshine Act — disclosed transfers of value, not a quality rating.
Source: CMS Open Payments
- 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 1295894426 · Geriatric Medicine (Internal Medicine) Physician
NPI-10 · ENUM-LEGACY · TAX-NARROW · RX-MID · BOOK-THIN · PHOTO-ENUM
- NPI-10 1295894426
- ENUM-LEGACY 2006
- TAX-NARROW 4,171
- RX-MID 1,652
- BOOK-THIN 21 in District of Columbia
- PHOTO-ENUM Dean Harrell · 2006
Thomas Obisesan, MD's Medicare Part D volume vs every U.S. prescriber
Total Medicare Part D claims, 2023, across all CMS prescribers nationally
1,652 ≥ 82nd percentile 82% 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 certification likely (heuristic, not verified)
Thomas Obisesan, 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 Thomas Obisesan, MD?
Quality data not reportedPrimary specialty
Geriatric Medicine (Internal Medicine) Physician
Medicare Part D claims
1,652 63% vs specialty avg
Specialty distribution in District of Columbia
How Geriatric Medicine (Internal Medicine) Physician compares to other specialties among District of Columbia 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).
Practice Address
Provider Details
| NPI | 1295894426 |
|---|---|
| Specialty | Geriatric Medicine (Internal Medicine) Physician |
| Credentials | MD |
| Gender | Male |
| NPI Issued | 12/06/2006 |
Hospital and facility affiliations
Facilities where Thomas Obisesan, 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.
Howard University
Washington, DC
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 Thomas Obisesan, MD. Source: openpaymentsdata.cms.gov.
Total received
$21.0K
Largest payer
Lilly USA, LLC
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.
Brand vs generic prescribing mix · Generic-heavy
Thomas Obisesan, MD - brand share 8.0%
Geriatric Medicine (Internal Medicine) Physician average
8% brand-name claims vs 92% generic, on 1,652 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.
1,652
Total Claims
$186K
Total Drug Cost
53
Medicare Beneficiaries
Prescribing Breakdown
- 30-Day Fills
- 2,047
- Total Day Supply
- 30,133
- Brand vs Generic
- 8% brand / 92% generic
- Brand Drug Cost
- $167K
- Generic Drug Cost
- $18K
Patient Demographics
- Average Patient Age
- 77.2 years
- Avg HCC Risk Score
- 2.39
- Gender Split
- 66% female / 34% male
Top Prescribed Drugs (Medicare Part D)
Top drugs by claim count for calendar year 2023. Based on Medicare Part D data only.
What Thomas Obisesan, MD prescribes most
Top Medicare Part D drugs by claim count, 2023
- Atorvastatin Calcium
Atorvastatin Calcium
136 claims
- Metformin Hcl
Metformin Hcl
114 claims
- Lisinopril-Hydroch…
Lisinopril-Hydrochlorothiazide
110 claims
- Levetiracetam
Levetiracetam
108 claims
- Gabapentin
Gabapentin
103 claims
- Pravastatin Sodium
Pravastatin Sodium
98 claims
- Amlodipine Besylate
Amlodipine Besylate
76 claims
- Eliquis
Eliquis
65 claims
| Drug | Claims |
|---|---|
| Atorvastatin Calcium | 136 |
| Metformin Hcl | 114 |
| Lisinopril-Hydrochlorothiazide Lisinopril/Hydrochlorothiazide | 110 |
| Levetiracetam | 108 |
| Gabapentin | 103 |
| Pravastatin Sodium | 98 |
| Amlodipine Besylate | 76 |
| Eliquis Apixaban | 65 |
| Lisinopril | 58 |
| Carvedilol | 52 |
* 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 DC →
All providers in District of Columbia →
Compare specialties →
Geriatric Medicine (Internal Medicine) Physician Overview
How Thomas Obisesan, MD 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
Thomas Obisesan, MD's 1,652 claims are below the specialty average of 4,450.
Nationwide Geriatric Medicine (Internal Medicine) Physician peers with similar MIPS or enrollment year
Two federal-record peer sets for Obisesan, both outside District of Columbia 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 (Internal Medicine) Physician Providers in District of Columbia
Other clinicians with the same primary specialty enrolled in District of Columbia, drawn from the same CMS NPPES roster as Obisesan.
One of 21 Geriatric Medicine (Internal Medicine) Physician providers enrolled in District of Columbia, 5 are shown here.
Frequently Asked Questions
What is Thomas Obisesan, MD's specialty? ▼
Thomas Obisesan, MD specializes in Geriatric Medicine (Internal Medicine) Physician and practices in Washington, District of Columbia. Credentials: MD.
How much does Thomas Obisesan, MD prescribe under Medicare Part D? ▼
In 2023, Thomas Obisesan, MD wrote 1,652 Medicare Part D claims totaling $186K in drug costs for 53 beneficiaries.
Where is Thomas Obisesan, MD located? ▼
Thomas Obisesan, MD is located at 2041 GEORGIA AVE NW, Washington, DC, 20060. Phone: (202) 865-3290.
What is Thomas Obisesan, MD's NPI number? ▼
Thomas Obisesan, MD's National Provider Identifier (NPI) is 1295894426, issued on 12/06/2006.
Does Thomas Obisesan, MD prescribe more brand-name or generic drugs? ▼
Thomas Obisesan, MD's prescribing is 8% brand-name and 92% generic drugs by claim count, with $167K in brand drug costs.
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 Thomas Obisesan, MD prescribe most often? ▼
Based on 2023 Medicare Part D data, Thomas Obisesan, MD's most frequently prescribed drugs include Atorvastatin Calcium, Metformin Hcl, Lisinopril-Hydrochlorothiazide. This reflects Medicare Part D prescriptions only and does not include commercial insurance or other payer types.
Does Thomas Obisesan, MD accept Medicare? ▼
Thomas Obisesan, MD appears in CMS Medicare data with 1,652 Part D claims and 53 Medicare beneficiaries in 2023. Contact the provider's office directly to confirm current Medicare enrollment and accepted plans.
How can I verify Thomas Obisesan, MD's credentials? ▼
Thomas Obisesan, MD's NPI is 1295894426 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 (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.