James Simsarian, M.D.
NPI 1235108986 · Neurology Physician · Fairfax, VA
Enrolled with Medicare as Practitioner - Neurology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Simsarian, M.D. is a Neurology Physician provider in Fairfax, VA (NPI 1235108986).
Provider details
- NPI number
- 1235108986
- Entity type
- Individual
- Primary specialty
- Neurology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 0101023418 (VA)
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 tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,472 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 539 | $139 |
| Ultrasound of Both Sides of Head and Neck Blood Flow93880 | 246 | $218 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 205 | $145 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 205 | $188 |
| Administration of Chemotherapy Into Vein, Each Additional Hour96415 | 194 | $30 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 171 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Gabapentin | 122 | 45 |
| Baclofen | 110 | 38 |
| Pregabalin | 60 | 18 |
| Donepezil Hcl | 55 | 19 |
| Ofatumumabbrand: Kesimpta Pen | 46 | — |
| Teriflunomide | 44 | — |
| Dalfampridinebrand: Dalfampridine Er | 41 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$388 across 12 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-03-15
- Last updated
- 2022-06-08
- Certified
- 2022-06-08
Frequently asked questions
- What is James Simsarian's NPI number?
- James Simsarian's National Provider Identifier (NPI) is 1235108986, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Simsarian's specialty?
- James Simsarian is listed in the NPPES registry with a primary specialty of Neurology Physician (Allopathic & Osteopathic Physicians).
- Where is James Simsarian located?
- James Simsarian's practice location on file with NPPES is 3020 Hamaker Ct, Fairfax, VA 22031-2238.
- What is James Simsarian's phone number?
- The practice phone number listed in the NPPES registry for James Simsarian is (703) 876-0800.
- Does James Simsarian accept Medicare?
- James Simsarian is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Simsarian's NPI active?
- Yes — James Simsarian's NPI (1235108986) is active in the NPPES registry as of the last update on 2022-06-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.