John Ahn, MD
NPI 1023638186 · Anesthesiology Physician · Birmingham, AL
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Ahn, MD is a Anesthesiology Physician provider in Birmingham, AL (NPI 1023638186).
Provider details
- NPI number
- 1023638186
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 43010 (AL)
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
6 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
- 2020-04-19
- Last updated
- 2025-09-16
- Certified
- 2025-09-16
Frequently asked questions
- What is John Ahn's NPI number?
- John Ahn's National Provider Identifier (NPI) is 1023638186, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Ahn's specialty?
- John Ahn is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is John Ahn located?
- John Ahn's practice location on file with NPPES is 625 19th St S, Birmingham, AL 35233-1900.
- What is John Ahn's phone number?
- The practice phone number listed in the NPPES registry for John Ahn is (205) 934-4696.
- Does John Ahn accept Medicare?
- John Ahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Ahn's NPI active?
- Yes — John Ahn's NPI (1023638186) is active in the NPPES registry as of the last update on 2025-09-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.