Allison Williams, MD
NPI 1588127237 · Internal Medicine Physician · Indianapolis, IN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Allison Williams, MD is a Internal Medicine Physician provider in Indianapolis, IN (NPI 1588127237).
Provider details
- NPI number
- 1588127237
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
7 yrs in NPPES registry
- Profile completeness38% of score
83% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 33 | 15 |
| Fluticasone/Umeclidin/Vilanterbrand: Trelegy Ellipta | 25 | — |
| Albuterol Sulfatebrand: Ventolin Hfa | 21 | — |
| Budesonide/Formoterol Fumaratebrand: Budesonide-Formoterol Fumarate | 18 | — |
| Prednisone | 18 | — |
| Tiotropium Bromidebrand: Spiriva Respimat | 17 |
Practice location
Mailing address
Additional practice locations (1)
- 1120 W Michigan St # Cl630Indianapolis, IN 46202-5209Phone: (317) 278-2687Fax: (317) 278-2650
Registry dates
- Enumerated
- 2019-04-10
- Last updated
- 2022-10-05
- Certified
- 2022-10-05
Frequently asked questions
- What is Allison Williams's NPI number?
- Allison Williams's National Provider Identifier (NPI) is 1588127237, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Allison Williams's specialty?
- Allison Williams is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Allison Williams located?
- Allison Williams's practice location on file with NPPES is 5515 W 38th St, Indianapolis, IN 46254-2995.
- What is Allison Williams's phone number?
- The practice phone number listed in the NPPES registry for Allison Williams is (317) 880-3838.
- Does Allison Williams accept Medicare?
- Allison Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Allison Williams's NPI active?
- Yes — Allison Williams's NPI (1588127237) is active in the NPPES registry as of the last update on 2022-10-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.