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Mark Agness, M.D.
NPI 1609816743 · Family Medicine Physician · Marysville, CA
Mark Agness, M.D. is a Family Medicine Physician provider in Marysville, CA (NPI 1609816743).
Provider details
- NPI number
- 1609816743
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- G68116 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
1 documented practice location
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
726 4th Street
Marysville, CA 94901
Phone: (530) 749-4300
Street-level locationGet directions
Mailing address
2100 Powell St
Emeryville, CA 94608-1826
Registry dates
- Enumerated
- 2006-06-07
- Last updated
- 2007-08-27
Frequently asked questions
- What is Mark Agness's NPI number?
- Mark Agness's National Provider Identifier (NPI) is 1609816743, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Agness's specialty?
- Mark Agness is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Agness located?
- Mark Agness's practice location on file with NPPES is 726 4th Street, Marysville, CA 94901.
- What is Mark Agness's phone number?
- The practice phone number listed in the NPPES registry for Mark Agness is (530) 749-4300.
- Is Mark Agness's NPI active?
- Yes — Mark Agness's NPI (1609816743) is active in the NPPES registry as of the last update on 2007-08-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.