John Clasen, O.D.
NPI 1780649707 · Optometrist · Birmingham, AL
Enrolled with Medicare as Order and Referring Only - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Clasen, O.D. is a Optometrist provider in Birmingham, AL (NPI 1780649707).
Provider details
- NPI number
- 1780649707
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- No
- License
- S-839-TA-366 (AL)
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
- 2006-04-20
- Last updated
- 2017-02-24
Frequently asked questions
- What is John Clasen's NPI number?
- John Clasen's National Provider Identifier (NPI) is 1780649707, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Clasen's specialty?
- John Clasen is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is John Clasen located?
- John Clasen's practice location on file with NPPES is 840 Montclair Rd, Birmingham, AL 35213-1920.
- What is John Clasen's phone number?
- The practice phone number listed in the NPPES registry for John Clasen is (205) 591-2311.
- Does John Clasen accept Medicare?
- John Clasen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Clasen's NPI active?
- Yes — John Clasen's NPI (1780649707) is active in the NPPES registry as of the last update on 2017-02-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.