Nicholas H. Mast, M.D., Inc.
NPI 1235490061 · Orthopaedic Surgery Physician · Novato, CA
Nicholas H. Mast, M.D., Inc. is a Orthopaedic Surgery Physician organization in Novato, CA (NPI 1235490061).
Provider details
- NPI number
- 1235490061
- Entity type
- Organization
- Primary specialty
- Orthopaedic Surgery PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Nicholas Mast, Owner(415) 530-5330
- License
- A98951 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
14 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
3 documented practice locations
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.
Practice location
Mailing address
Additional practice locations (2)
- 2250 Hayes St Ste 208San Francisco, CA 94117-1078Phone: (415) 530-5330Fax: (415) 530-5333
- 8 Alpine Lily PlSan Rafael, CA 94903-1090Phone: (415) 717-9776Fax: (415) 530-5333
Registry dates
- Enumerated
- 2012-06-07
- Last updated
- 2023-01-09
- Certified
- 2023-01-09
Frequently asked questions
- What is Nicholas H. Mast, M.D., Inc.'s NPI number?
- Nicholas H. Mast, M.D., Inc.'s National Provider Identifier (NPI) is 1235490061, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Nicholas H. Mast, M.D., Inc.?
- Nicholas H. Mast, M.D., Inc. is classified in the NPPES registry as Orthopaedic Surgery Physician (Allopathic & Osteopathic Physicians).
- Where is Nicholas H. Mast, M.D., Inc. located?
- Nicholas H. Mast, M.D., Inc.'s practice location on file with NPPES is 100 Rowland Way Ste 200, Novato, CA 94945-5041.
- What is Nicholas H. Mast, M.D., Inc.'s phone number?
- The practice phone number listed in the NPPES registry for Nicholas H. Mast, M.D., Inc. is (415) 530-5330.
- Who is the authorized official for Nicholas H. Mast, M.D., Inc.?
- The authorized official listed on Nicholas H. Mast, M.D., Inc.'s NPPES record is Nicholas Mast, Owner. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Nicholas H. Mast, M.D., Inc.'s NPI active?
- Yes — Nicholas H. Mast, M.D., Inc.'s NPI (1235490061) is active in the NPPES registry as of the last update on 2023-01-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.