1. Home
  2. Directory
  3. California
  4. San Francisco
  5. Psychiatry Neurology
  6. NPI Profile

DR. WILLIAM WEISS MD
NPI 1417022856
Psychiatry & Neurology - Neurology with Special Qualifications in Child Neurology in San Francisco, CA

Active since November 21, 2006PECOS Enrolled
NEUROLOGY UNIV OF CA, 533 PARNASSUS AVE, ROOM U441K, SAN FRANCISCO, CA 94143(415) 476-1000 Get Directions Write a Review

NPPES record last updated: April 29, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. William Weiss Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. WILLIAM WEISS MD (NPI 1417022856) is an individual neurology with special qualifications in child neurology provider in San Francisco, California, licensed in California (G72677) and active in the NPI registry since November 2006. He is enrolled in Medicare PECOS and maintains a secondary practice location in San Francisco.

NPPES Registry Identity

NPI1417022856
Entity TypeIndividualMale
Primary Taxonomy2084N0402X
Provider Legal NameDR. WILLIAM WEISSCredential: MD
Location AddressNEUROLOGY UNIV OF CA, 533 PARNASSUS AVE, ROOM U441KSan Francisco, CA 94143-0001
Mailing Address1450 Third St, Neurology Univ Of Ca, Room Hd277San Francisco, CA 94158-9001
Phone(415) 476-1000
Sole ProprietorNo
Enumeration DateNovember 21, 2006
Last NPPES UpdateApril 29, 2026
NPPES CertifiedApril 29, 2026
✔ NPI 1417022856 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyPsychiatry & Neurology · Neurology with Special Qualifications in Child NeurologyAllopathic & Osteopathic Physicians
Taxonomy Code2084N0402X
License✔ Licensed in CA · G72677
Definition
A Child Neurologist specializes in neurology with special skills in diagnosis and treatment of neurologic disorders of the neonatal period, infancy, early childhood, and adolescence.
Also ListedPediatricsTaxonomy 208000000X · License G72677 (CA)
NEUROLOGY UNIV OF CA, San Francisco, CA 94143
Open in Google Maps ↗

Secondary Practice Location 1

Location 11001 Potrero Ave, Bldg. 5, 6MSan Francisco, CA 94110-3518 · Phone (628) 206-8376

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. William Weiss Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

3

Medicare enrollment records show William Weiss reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

University Of California Sfgh Medical Group
2.5 mi
Family Medicine
1001 POTRERO AVE, BLDG 80 WARD 83 RM 320
San Francisco, CA 94110
  • Reassigned Medicare billing, California enrollment
  • 842 clinicians in this Medicare group
NPI 1174598296 (628) 206-8610
University Of California San Francisco
4.6 mi
Surgery
400 PARNASSUS AVE, MCB 300
San Francisco, CA 94143
  • Reassigned Medicare billing, California enrollment
  • 5,645 clinicians in this Medicare group
NPI 1346329380 (415) 353-2161
Ucsf Medical Group Business Services
4.6 mi
Internal Medicine
400 PARNASSUS AVE
San Francisco, CA 94122
  • Reassigned Medicare billing, California enrollment
  • 5,544 clinicians in this Medicare group
NPI 1477624104 (415) 353-2808

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94143 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$153.83 typical visit price
range $69.00 – $202.35
Typical copayment $38.45 (range $17.25 – $50.58)
Most-billed visit code 99204
Established Patient
$119.48 typical visit price
range $23.44 – $166.46
Typical copayment $29.87 (range $5.86 – $41.61)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is William Weiss's NPI number?

The NPI number for William Weiss is 1417022856. It was assigned to this individual provider in the NPPES registry on November 21, 2006.

Where is William Weiss located?

William Weiss practices at Neurology Univ Of Ca 533 Parnassus Ave, Room U441k, San Francisco, CA 94143. The listed phone number is (415) 476-1000.

What is William Weiss's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Neurology with Special Qualifications in Child Neurology, with taxonomy code 2084N0402X.

Is William Weiss enrolled in Medicare?

Yes. William Weiss is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for William Weiss's services?

According to the CMS Revalidation Reassignment List (October 2026 release), William Weiss reassigns Medicare benefits to 3 organizations: University Of California Sfgh Medical Group (San Francisco, CA), University Of California San Francisco (San Francisco, CA) and Ucsf Medical Group Business Services (San Francisco, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for William Weiss's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for William Weiss was last updated on April 29, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.