William Hilgendorf, PHD
NPI 1265439921 · Clinical Psychologist · Carmel, IN
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Hilgendorf, PHD is a Clinical Psychologist provider in Carmel, IN (NPI 1265439921).
Provider details
- NPI number
- 1265439921
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- Yes
- License
- 20040359A (IN)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
14 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Psychiatric Diagnostic Evaluation90791 | 14 | $164 |
Typical Medicare-allowed amounts for these services range $164–$164 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (2)
- 11725 Illinois StCarmel, IN 46032-3008Phone: (317) 688-4864
- 9135 N Meridian St Ste A6Indianapolis, IN 46260-1815Phone: (317) 445-9623Fax: (317) 855-7246
Registry dates
- Enumerated
- 2005-07-07
- Last updated
- 2021-10-19
- Certified
- 2021-10-19
Frequently asked questions
- What is William Hilgendorf's NPI number?
- William Hilgendorf's National Provider Identifier (NPI) is 1265439921, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Hilgendorf's specialty?
- William Hilgendorf is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is William Hilgendorf located?
- William Hilgendorf's practice location on file with NPPES is 11725 N Illinois St, Carmel, IN 46032-3008.
- What is William Hilgendorf's phone number?
- The practice phone number listed in the NPPES registry for William Hilgendorf is (317) 688-2647.
- Does William Hilgendorf accept Medicare?
- William Hilgendorf is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Hilgendorf's NPI active?
- Yes — William Hilgendorf's NPI (1265439921) is active in the NPPES registry as of the last update on 2021-10-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.