Joseph Greenberg, MD
NPI 1912085937 · Specialist · San Rafael, CA
Enrolled with Medicare as Practitioner - Dermatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Greenberg, MD is a Specialist provider in San Rafael, CA (NPI 1912085937).
Provider details
- NPI number
- 1912085937
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- MD
- Sex
- Male
- Sole proprietor
- Yes
- License
- C35289 (CA)
Specialties & taxonomies
Other Service Providers
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
1,256 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) |
|---|---|---|
| Therapy Procedure Using Ultraviolet Radiation With Tar Or Petroleum Jelly Application96910 | 596 | $164 |
| Destruction of Precancer Skin Growth, 2-14 Growths17003 | 347 | $9 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 109 | $110 |
| Destruction of Precancer Skin Growth, 1 Growth17000 | 94 | $69 |
| Destruction of Skin Growth, 1-14 Growths17110 | 42 | $150 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2010-04-22
Frequently asked questions
- What is Joseph Greenberg's NPI number?
- Joseph Greenberg's National Provider Identifier (NPI) is 1912085937, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Greenberg's specialty?
- Joseph Greenberg is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Joseph Greenberg located?
- Joseph Greenberg's practice location on file with NPPES is 750 Las Gallinas Ave, San Rafael, CA 94903-3438.
- What is Joseph Greenberg's phone number?
- The practice phone number listed in the NPPES registry for Joseph Greenberg is (415) 472-3930.
- Does Joseph Greenberg accept Medicare?
- Joseph Greenberg is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Greenberg's NPI active?
- Yes — Joseph Greenberg's NPI (1912085937) is active in the NPPES registry as of the last update on 2010-04-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.