William Mcmullen, PHD
NPI 1063440188 · Clinical Neuropsychologist · San Francisco, CA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Mcmullen, PHD is a Clinical Neuropsychologist provider in San Francisco, CA (NPI 1063440188).
Provider details
- NPI number
- 1063440188
- Entity type
- Individual
- Primary specialty
- Clinical NeuropsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Male
- Sole proprietor
- Yes
- License
- PSY15879 (CA)
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
19 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
224 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 | 124 | $47 |
| Evaluation of Neuropsychological Test, Each Additional Hour96133 | 56 | $113 |
| Evaluation of Neuropsychological Test, First Hour96132 | 16 | $149 |
| Exam of Neurobehavioral Status, First Hour96116 | 14 | $106 |
| Administration of Psychological Or Neuropsychological Test, First 30 Minutes96136 | 14 | $52 |
Typical Medicare-allowed amounts for these services range $47–$149 (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
Registry dates
- Enumerated
- 2006-06-29
- Last updated
- 2007-07-08
Frequently asked questions
- What is William Mcmullen's NPI number?
- William Mcmullen's National Provider Identifier (NPI) is 1063440188, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Mcmullen's specialty?
- William Mcmullen is listed in the NPPES registry with a primary specialty of Clinical Neuropsychologist (Behavioral Health & Social Service Providers).
- Where is William Mcmullen located?
- William Mcmullen's practice location on file with NPPES is 2100 Webster St, San Francisco, CA 94115-2373.
- What is William Mcmullen's phone number?
- The practice phone number listed in the NPPES registry for William Mcmullen is (650) 270-1452.
- Does William Mcmullen accept Medicare?
- William Mcmullen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Mcmullen's NPI active?
- Yes — William Mcmullen's NPI (1063440188) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.