Mary Nakamura, M.D.
NPI 1861508848 · Rheumatology Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Nakamura, M.D. is a Rheumatology Physician provider in San Francisco, CA (NPI 1861508848).
Provider details
- NPI number
- 1861508848
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- G063340 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
192 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 76 | $162 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 51 | $109 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 36 | $88 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 18 | $19 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 11 | $144 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 21 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 199 | 45 |
| Methotrexate Sodiumbrand: Methotrexate | 82 | 22 |
| Etanerceptbrand: Enbrel | 56 | — |
| Etanerceptbrand: Enbrel Sureclick | 45 | — |
| Alendronate Sodium | 40 | 13 |
| Tocilizumabbrand: Actemra Actpen | 38 | — |
| Hydroxychloroquine Sulfate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-22
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mary Nakamura's NPI number?
- Mary Nakamura's National Provider Identifier (NPI) is 1861508848, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Nakamura's specialty?
- Mary Nakamura is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Nakamura located?
- Mary Nakamura's practice location on file with NPPES is 4150 Clement St, San Francisco, CA 94121-1545.
- What is Mary Nakamura's phone number?
- The practice phone number listed in the NPPES registry for Mary Nakamura is (415) 750-2104.
- Does Mary Nakamura accept Medicare?
- Mary Nakamura is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Nakamura's NPI active?
- Yes — Mary Nakamura's NPI (1861508848) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.