Oluwaseyi Ajayi, M.D.
NPI 1871741108 · Internal Medicine Physician · Fairfax, VA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Oluwaseyi Ajayi, M.D. is a Internal Medicine Physician provider in Fairfax, VA (NPI 1871741108).
Provider details
- NPI number
- 1871741108
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD-440659 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
782 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 518 | $125 |
| Hospital Discharge Day Management, More Than 30 Minutes99239 | 133 | $122 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 86 | $180 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 27 | $83 |
| Critical Care, First 30-74 Minutes99291 | 18 | $224 |
Typical Medicare-allowed amounts for these services range $83–$224 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Apixabanbrand: Eliquis | 42 | 15 |
| Pantoprazole Sodium | 16 | 13 |
| Cefuroxime Axetilbrand: Cefuroxime | 15 | 15 |
| Prednisone | 15 | 15 |
| Amlodipine Besylate | 14 | — |
| Furosemide | 14 | 13 |
| Empagliflozin |
Practice location
Mailing address
Additional practice locations (1)
- 7600 Central AvePhiladelphia, PA 19111-2442Phone: (215) 728-2000Fax: (215) 214-4119
Registry dates
- Enumerated
- 2008-08-28
- Last updated
- 2022-09-27
- Certified
- 2022-09-27
Frequently asked questions
- What is Oluwaseyi Ajayi's NPI number?
- Oluwaseyi Ajayi's National Provider Identifier (NPI) is 1871741108, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Oluwaseyi Ajayi's specialty?
- Oluwaseyi Ajayi is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Oluwaseyi Ajayi located?
- Oluwaseyi Ajayi's practice location on file with NPPES is 3580 Joseph Siewick Dr Ste 306, Fairfax, VA 22033-1764.
- What is Oluwaseyi Ajayi's phone number?
- The practice phone number listed in the NPPES registry for Oluwaseyi Ajayi is (703) 391-4520.
- Does Oluwaseyi Ajayi accept Medicare?
- Oluwaseyi Ajayi is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Oluwaseyi Ajayi's NPI active?
- Yes — Oluwaseyi Ajayi's NPI (1871741108) is active in the NPPES registry as of the last update on 2022-09-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.