Mark Zilm, OD
NPI 1043204480 · Optometrist · Glenwood Springs, CO
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mark Zilm, OD is a Optometrist provider in Glenwood Springs, CO (NPI 1043204480).
Provider details
- NPI number
- 1043204480
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Male
- Sole proprietor
- No
- License
- 1150 (CO)
Specialties & taxonomies
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
- 2005-08-31
- Last updated
- 2011-09-09
Frequently asked questions
- What is Mark Zilm's NPI number?
- Mark Zilm's National Provider Identifier (NPI) is 1043204480, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Zilm's specialty?
- Mark Zilm is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Mark Zilm located?
- Mark Zilm's practice location on file with NPPES is 3122 Blake Ave, Glenwood Springs, CO 81601-4415.
- What is Mark Zilm's phone number?
- The practice phone number listed in the NPPES registry for Mark Zilm is (970) 945-2020.
- Does Mark Zilm accept Medicare?
- Mark Zilm is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mark Zilm's NPI active?
- Yes — Mark Zilm's NPI (1043204480) is active in the NPPES registry as of the last update on 2011-09-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.