Robert Belknap, MD
NPI 1336217306 · Adult Medicine Physician · Mill Valley, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Robert Belknap, MD is a Adult Medicine Physician provider in Mill Valley, CA (NPI 1336217306).
Provider details
- NPI number
- 1336217306
- Entity type
- Individual
- Primary specialty
- Adult Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- A24275 (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
595 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 185 | $153 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 164 | $110 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 73 | $98 |
| Telephone Medical Discussion With Physician, 21-30 Minutes99443 | 71 | $148 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 48 | $214 |
| Established Patient Office Or Other Outpatient Visit With Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 98 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 164 | 43 |
| Atorvastatin Calcium | 151 | 42 |
| Gabapentin | 137 | 22 |
| Amlodipine Besylate | 135 | 31 |
| Rosuvastatin Calcium | 124 | 34 |
| Losartan Potassium | 112 | 26 |
| Metoprolol Succinate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-30
- Last updated
- 2008-04-10
Frequently asked questions
- What is Robert Belknap's NPI number?
- Robert Belknap's National Provider Identifier (NPI) is 1336217306, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Robert Belknap's specialty?
- Robert Belknap is listed in the NPPES registry with a primary specialty of Adult Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Robert Belknap located?
- Robert Belknap's practice location on file with NPPES is 655 Redwood Hwy, Mill Valley, CA 94941-3034.
- What is Robert Belknap's phone number?
- The practice phone number listed in the NPPES registry for Robert Belknap is (415) 384-0506.
- Does Robert Belknap accept Medicare?
- Robert Belknap is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Robert Belknap's NPI active?
- Yes — Robert Belknap's NPI (1336217306) is active in the NPPES registry as of the last update on 2008-04-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.