John Underwood, MD
NPI 1508391194 · Internal Medicine Physician · Indianapolis, IN
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Underwood, MD is a Internal Medicine Physician provider in Indianapolis, IN (NPI 1508391194).
Provider details
- NPI number
- 1508391194
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 01086002A (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
9 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
3 documented practice locations
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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 · 1 distinct drug on file.
| Drug | Part D claims (2024) |
|---|---|
| Prochlorperazine Maleate | 14 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$70 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 705 Riley Hospital Dr Rm 5867Indianapolis, IN 46202-5109Phone: (317) 948-0003
- 550 University Blvd # Uh1501Indianapolis, IN 46202-5149Phone: (317) 948-1310Fax: (317) 948-0503
Registry dates
- Enumerated
- 2017-04-20
- Last updated
- 2025-03-24
- Certified
- 2025-03-24
Frequently asked questions
- What is John Underwood's NPI number?
- John Underwood's National Provider Identifier (NPI) is 1508391194, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Underwood's specialty?
- John Underwood is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Underwood located?
- John Underwood's practice location on file with NPPES is 8111 S Emerson Ave Ste 101, Indianapolis, IN 46237-8601.
- What is John Underwood's phone number?
- The practice phone number listed in the NPPES registry for John Underwood is (317) 859-5252.
- Does John Underwood accept Medicare?
- John Underwood is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Underwood's NPI active?
- Yes — John Underwood's NPI (1508391194) is active in the NPPES registry as of the last update on 2025-03-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.