Neal Birnbaum, M.D.
NPI 1437142882 · Rheumatology Physician · San Rafael, CA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Neal Birnbaum, M.D. is a Rheumatology Physician provider in San Rafael, CA (NPI 1437142882).
Provider details
- NPI number
- 1437142882
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- C36561 (CA)
Specialties & taxonomies
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
2 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
1,242 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) |
|---|---|---|
| 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 | 401 | $19 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 364 | $154 |
| Administration of Chemotherapy Into Vein, 1 Hour Or Less96413 | 156 | $176 |
| Administration of Non-Hormonal Anti-Neoplastic Chemotherapy Under Skin Or Into Muscle96401 | 85 | $97 |
| Infusion Into a Vein for Therapy, Prevention, Or Diagnosis, 1 Hour Or Less96365 | 79 | $84 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 25 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Prednisone | 300 | 100 |
| Hydroxychloroquine Sulfate | 208 | 64 |
| Methotrexate Sodiumbrand: Methotrexate | 138 | 43 |
| Allopurinol | 90 | 28 |
| Adalimumabbrand: Humira(cf) Pen | 87 | — |
| Etanerceptbrand: Enbrel | 74 | — |
| Etanercept |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$23,460 across 141 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
Additional practice locations (1)
- 2100 Webster StSte 112San Francisco, CA 94115-2373Phone: (415) 923-3060Fax: (415) 749-0841
Registry dates
- Enumerated
- 2005-08-31
- Last updated
- 2025-03-14
- Certified
- 2025-03-14
Frequently asked questions
- What is Neal Birnbaum's NPI number?
- Neal Birnbaum's National Provider Identifier (NPI) is 1437142882, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Neal Birnbaum's specialty?
- Neal Birnbaum is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Neal Birnbaum located?
- Neal Birnbaum's practice location on file with NPPES is 4000 Civic Center Dr Ste 200a, San Rafael, CA 94903-5233.
- What is Neal Birnbaum's phone number?
- The practice phone number listed in the NPPES registry for Neal Birnbaum is (415) 464-9604.
- Does Neal Birnbaum accept Medicare?
- Neal Birnbaum is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Neal Birnbaum's NPI active?
- Yes — Neal Birnbaum's NPI (1437142882) is active in the NPPES registry as of the last update on 2025-03-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.