Mark Helmus, O.D.
NPI 1558343905 · Optometrist · Davis, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Helmus, O.D. is a Optometrist provider in Davis, CA (NPI 1558343905).
Provider details
- NPI number
- 1558343905
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- OPT 00007215 TPA (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Eye and Vision Services Providers
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
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
Mailing address
Registry dates
- Enumerated
- 2005-11-18
- Last updated
- 2011-10-28
Frequently asked questions
- What is Mark Helmus's NPI number?
- Mark Helmus's National Provider Identifier (NPI) is 1558343905, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Helmus's specialty?
- Mark Helmus is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Mark Helmus located?
- Mark Helmus's practice location on file with NPPES is 353 2nd St, Davis, CA 95616.
- What is Mark Helmus's phone number?
- The practice phone number listed in the NPPES registry for Mark Helmus is (530) 758-2122.
- Does Mark Helmus accept Medicare?
- Mark Helmus is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Helmus's NPI active?
- Yes — Mark Helmus's NPI (1558343905) is active in the NPPES registry as of the last update on 2011-10-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.