Erika Zipf-Williams, PHD
NPI 1811037468 · Clinical Neuropsychologist · San Francisco, CA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Erika Zipf-Williams, PHD is a Clinical Neuropsychologist provider in San Francisco, CA (NPI 1811037468).
Provider details
- NPI number
- 1811037468
- Entity type
- Individual
- Primary specialty
- Clinical NeuropsychologistBehavioral Health & Social Service Providers
- Credential
- PHD
- Sex
- Female
- Sole proprietor
- No
- License
- PSY14863 (CA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
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
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
42 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) |
|---|---|---|
| Treatment of Behavior Impacting Health, Initial 30 Minutes96158 | 31 | $65 |
| Assessment of Health Behavior96156 | 11 | $97 |
Typical Medicare-allowed amounts for these services range $65–$97 (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
- 2007-02-06
- Last updated
- 2011-11-03
Frequently asked questions
- What is Erika Zipf-Williams's NPI number?
- Erika Zipf-Williams's National Provider Identifier (NPI) is 1811037468, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Erika Zipf-Williams's specialty?
- Erika Zipf-Williams is listed in the NPPES registry with a primary specialty of Clinical Neuropsychologist (Behavioral Health & Social Service Providers).
- Where is Erika Zipf-Williams located?
- Erika Zipf-Williams's practice location on file with NPPES is 375 Laguna Honda Blvd, San Francisco, CA 94116-1411.
- What is Erika Zipf-Williams's phone number?
- The practice phone number listed in the NPPES registry for Erika Zipf-Williams is (415) 759-2300.
- Does Erika Zipf-Williams accept Medicare?
- Erika Zipf-Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Erika Zipf-Williams's NPI active?
- Yes — Erika Zipf-Williams's NPI (1811037468) is active in the NPPES registry as of the last update on 2011-11-03.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.