William Baker, M.D.
NPI 1578529046 · Allergy & Immunology (Internal Medicine) Physician · Indianapolis, IN
William Baker, M.D. is a Allergy & Immunology (Internal Medicine) Physician provider in Indianapolis, IN (NPI 1578529046).
Provider details
- NPI number
- 1578529046
- Entity type
- Individual
- Primary specialty
- Allergy & Immunology (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 01046875 (IN)
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
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
- 2006-04-25
- Last updated
- 2023-10-05
- Certified
- 2023-10-05
Frequently asked questions
- What is William Baker's NPI number?
- William Baker's National Provider Identifier (NPI) is 1578529046, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Baker's specialty?
- William Baker is listed in the NPPES registry with a primary specialty of Allergy & Immunology (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is William Baker located?
- William Baker's practice location on file with NPPES is 1481 W 10th St, Indianapolis, IN 46202-2803.
- What is William Baker's phone number?
- The practice phone number listed in the NPPES registry for William Baker is (317) 988-3190.
- Is William Baker's NPI active?
- Yes — William Baker's NPI (1578529046) is active in the NPPES registry as of the last update on 2023-10-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.