Christopher Williams, PH.D.
NPI 1003505967 · Psychologist · Royal Oak, MI
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Christopher Williams, PH.D. is a Psychologist provider in Royal Oak, MI (NPI 1003505967).
Provider details
- NPI number
- 1003505967
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 6301019196 (MI)
Specialties & taxonomies
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
3 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
696 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) |
|---|---|---|
| Administration of Psychological Or Neuropsychological Test, Each Additional 30 Minutes96137 | 213 | $19 |
| Evaluation of Neuropsychological Test, Each Additional Hour96133 | 171 | $82 |
| Administration of Psychological Or Neuropsychological Test By Technician, Each Additional 30 Minutes96139 | 136 | $36 |
| Evaluation of Neuropsychological Test, First Hour96132 | 59 | $113 |
| Psychiatric Diagnostic Evaluation90791 | 58 | $156 |
| Administration of Psychological Or Neuropsychological Test, First 30 Minutes96136 | 35 | $25 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2023-05-04
- Last updated
- 2023-05-04
- Certified
- 2023-05-04
Frequently asked questions
- What is Christopher Williams's NPI number?
- Christopher Williams's National Provider Identifier (NPI) is 1003505967, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Christopher Williams's specialty?
- Christopher Williams is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Christopher Williams located?
- Christopher Williams's practice location on file with NPPES is 2510 Galpin Ave, Royal Oak, MI 48073-3115.
- What is Christopher Williams's phone number?
- The practice phone number listed in the NPPES registry for Christopher Williams is (773) 218-0523.
- Does Christopher Williams accept Medicare?
- Christopher Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Christopher Williams's NPI active?
- Yes — Christopher Williams's NPI (1003505967) is active in the NPPES registry as of the last update on 2023-05-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.