DR. WILLIAM REEVES TATOMER MD
NPI 1104862689
Psychiatry & Neurology - Psychiatry in San Mateo, CA

Q: What is William Tatomer's NPI number?

The NPI number for William Tatomer is 1104862689. It was assigned to this individual provider in the NPPES registry on June 21, 2006.

Q: What is William Tatomer's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Q: When was this NPI record last updated?

The NPPES record for William Tatomer was last updated on April 16, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years 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.

Active since June 21, 2006PECOS Enrolled

101 S SAN MATEO DR, SUITE 300, SAN MATEO, CA 94401(650) 342-4442(650) 342-8816 Get Directions Write a Review

NPPES record last updated: April 16, 2010. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Dr. William Reeves Tatomer Md NPPES

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

DR. WILLIAM REEVES TATOMER MD (NPI 1104862689) is an individual psychiatry provider in San Mateo, California, licensed in California (C35537) and active in the NPI registry since June 2006. He is enrolled in Medicare PECOS and is a graduate of University Of Virginia School Of Medicine (1971).

NPPES Registry Identity

NPI1104862689

Entity TypeIndividualMale

Primary Taxonomy2084P0800X

Provider Legal NameDR. WILLIAM REEVES TATOMERCredential: MD

Location Address101 S SAN MATEO DR, SUITE 300San Mateo, CA 94401-3819

Mailing Address101 S San Mateo Dr, Suite 300San Mateo, CA 94401-3819 · (650) 342-4442 · Fax (650) 342-8816

Phone(650) 342-4442

Fax(650) 342-8816

Sole ProprietorYes

Medical School CMSUniversity Of Virginia School Of MedicineGraduated 1971

Enumeration DateJune 21, 2006

Last NPPES UpdateApril 16, 2010

✔ NPI 1104862689 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyPsychiatry & Neurology · PsychiatryAllopathic & Osteopathic Physicians

Taxonomy Code2084P0800X

License✔ Licensed in CA · C35537

Definition

A Psychiatrist specializes in the prevention, diagnosis, and treatment of mental disorders, emotional disorders, psychotic disorders, mood disorders, anxiety disorders, substance-related disorders, sexual and gender identity disorders and adjustment disorders. Biologic, psychological, and social components of illnesses are explored and understood in treatment of the whole person. Tools used may include diagnostic laboratory tests, prescribed medications, evaluation and treatment of psychological and interpersonal problems with individuals and families, and intervention for coping with stress, crises, and other problems.

101 S SAN MATEO DR, San Mateo, CA 94401

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Other Identifiers 1

Medicare UPINA36014CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

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

PECOS PAC ID2769513506

PECOS Enrollment IDI20100623000440

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.

Areas of Expertise CMS Part B claims 2

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Psychotherapy with evaluation and management visit, 45 minutes 90836

Psychotherapy with evaluation and management is a 45-minute session where a healthcare provider discusses your mental and emotional health. They assess your current state, manage any issues, and help you develop coping strategies. This service aims to improve your overall well-being.

278 services44 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

278 services44 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 94401 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

$202.35 typical visit price

range $69.00 – $202.35

Typical copayment $50.58 (range $17.25 – $50.58)

Most-billed visit code 99205

Established Patient

$84.91 typical visit price

range $23.44 – $166.46

Typical copayment $21.22 (range $5.86 – $41.61)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

DR. ALLA SRAGETS M.D.

Obstetrics & Gynecology

101 S SAN MATEO DR, SUITE 112
SAN MATEO, CA 94401

San Mateo County (650) 344-7799

SAN MATEO RHEUMATOLOGY INC.

Internal Medicine (Rheumatology)

101 S SAN MATEO DR, SUITE 307
SAN MATEO, CA 94401

San Mateo County (650) 348-6011

DR. ROMMEL HINDOCHA D.C.

Chiropractor

101 S SAN MATEO DR, SUITE 200
SAN MATEO, CA 94401

San Mateo County (650) 347-2225

DALE JACKNOW

Pediatrics (Developmental - Behavioral Pediatrics)

101 S SAN MATEO DR, SUITE 208
SAN MATEO, CA 94401

San Mateo County (650) 342-3137

DR. CATRINA PATRICIA BLAKE FNP

Nurse Practitioner

101 S SAN MATEO DR
SAN MATEO, CA 94401

San Mateo County (650) 755-6400

DR. DALE JOSEPH RITZO M.D.

Internal Medicine

101 S SAN MATEO DR, SUITE 206
SAN MATEO, CA 94401

San Mateo County (650) 343-4003

AARON KWAN O.D.

Optometrist

101 S SAN MATEO DR, SUITE 310
SAN MATEO, CA 94401

San Mateo County (408) 807-8540

DORIS BURTON MD

Radiology (Diagnostic Radiology)

101 S SAN MATEO DR
SAN MATEO, CA 94401

San Mateo County (650) 343-1655

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 Tatomer's NPI number?

The NPI number for William Tatomer is 1104862689. It was assigned to this individual provider in the NPPES registry on June 21, 2006.

Where is William Tatomer located?

William Tatomer practices at 101 S San Mateo Dr Suite 300, San Mateo, CA 94401. The listed phone number is (650) 342-4442.

What is William Tatomer's specialty?

The primary specialty registered for this NPI is Psychiatry & Neurology, specializing in Psychiatry, with taxonomy code 2084P0800X.

Is William Tatomer enrolled in Medicare?

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

When was this NPI record last updated?

The NPPES record for William Tatomer was last updated on April 16, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 years 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.