San Marcos Medical Group Inc.
NPI 1639129372 · Family Medicine Physician · Fontana, CA
San Marcos Medical Group Inc. is a Family Medicine Physician organization in Fontana, CA (NPI 1639129372).
Provider details
- NPI number
- 1639129372
- Entity type
- Organization
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Natt Balbir, Md/President(951) 751-5470
- License
- GR0086722 (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
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 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
Other names (DBA / former)
- Doing business as
- Metropolitan Fammily Medical Clinic
Additional practice locations (1)
- 425 E Foothill BlvdRialto, CA 92376-5153Phone: (909) 546-1050Fax: (909) 546-1061
Registry dates
- Enumerated
- 2006-05-11
- Last updated
- 2026-06-01
- Certified
- 2026-06-01
Frequently asked questions
- What is San Marcos Medical Group Inc.'s NPI number?
- San Marcos Medical Group Inc.'s National Provider Identifier (NPI) is 1639129372, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is San Marcos Medical Group Inc.?
- San Marcos Medical Group Inc. is classified in the NPPES registry as Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is San Marcos Medical Group Inc. located?
- San Marcos Medical Group Inc.'s practice location on file with NPPES is 7965 Sierra Ave, Fontana, CA 92336-3329.
- What is San Marcos Medical Group Inc.'s phone number?
- The practice phone number listed in the NPPES registry for San Marcos Medical Group Inc. is (909) 356-4459.
- Who is the authorized official for San Marcos Medical Group Inc.?
- The authorized official listed on San Marcos Medical Group Inc.'s NPPES record is Natt Balbir, Md/President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is San Marcos Medical Group Inc.'s NPI active?
- Yes — San Marcos Medical Group Inc.'s NPI (1639129372) is active in the NPPES registry as of the last update on 2026-06-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.