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

NPI Status: Active since June 21, 2006

Contact Information

101 S SAN MATEO DR
SUITE 300
SAN MATEO, CA
ZIP 94401
Phone: (650) 342-4442
Fax: (650) 342-8816

Get Directions Reviews

  • Individual
  • Male
  • Years of Experience 55
  • Psychiatry & Neurology
  • Psychiatry
  • May Accept Medicare Approved Payment
  • PECOS Enrolled

About WILLIAM TATOMER

This page provides the complete NPI Profile along with additional information for William Tatomer, a provider established in San Mateo, California with a medical specialization in Psychiatry & Neurology, focusing in psychiatry and more than 55 years of experience. He graduated from University Of Virginia School Of Medicine in 1971. The healthcare provider is registered in the NPI registry with number 1104862689 assigned on June 2006. The practitioner's primary taxonomy code is 2084P0800X with license number C35537 (CA). The provider is registered as an individual and his NPI record was last updated 15 years ago.

NPI
1104862689
Provider Name
DR. WILLIAM REEVES TATOMER MD
Gender
Male
Entity Type
Individual
Location Address
101 S SAN MATEO DR SUITE 300 SAN MATEO, CA 94401
Location Phone
(650) 342-4442
Location Fax
(650) 342-8816
Mailing Address
101 S SAN MATEO DR SUITE 300 SAN MATEO, CA 94401
Mailing Phone
(650) 342-4442
Mailing Fax
(650) 342-8816
Medical School Name
UNIVERSITY OF VIRGINIA SCHOOL OF MEDICINE
Graduation Year
1971
Is Sole Proprietor?
Yes
Enumeration Date
06-21-2006
Last Update Date
04-16-2010
Code Navigator

A psychiatrist like William Tatomer are primary mental health physicians diagnose and treat mental illnesses through psychotherapy, psychoanalysis, hospitalization and medication. Psychiatrist help patients find solutions through changes in their behavioral patterns, explorations of experiences, group and family therapy.

Location Map

Specialty - Primary Taxonomy

The NPI enumerator requires providers to submit at least one taxonomy code. A taxonomy code is a unique 10-character code that describes the healthcare provider type, classification, and the area of specialization. There could be only one primary taxonomy code per NPI record. For individual NPIs the license data is associated to the taxonomy code.

Classification

Psychiatry & Neurology Psychiatry

Taxonomy Code
2084P0800X
Type
Allopathic & Osteopathic Physicians
License No.
C35537
License State
CA
Taxonomy Description
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.

Insurance Plans Accepted

According to publicly available information the provider might be accepting the following health plans from these health insurance companies:

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

Specific plan information not avaialable, please contact the provider to verify if your insurance plan is accepted.

*Please verify directly with this provider to make sure your insurance plan is currently accepted.

Additional Identifiers

The NPI Enumerator encourages providers to submit additional identifiers with their NPI application although the submission of this information is optional. The additional identifier(s) section includes other numbers or codes currently or formerly used as an identifier for the provider by other public healthcare entities. The identifiers may include UPIN, NSC, OSCAR, DEA, Medicaid State or PIN identification numbers.

Identifier Type / Code Identifier State Identifier Issuer
A36014MEDICARE UPIN (02)CA 

Medicare Participation & PECOS Enrollment Status

William Tatomer is registered with Medicare but maybe doesn't accept claims assignment. If you are a Medicare beneficiary call and confirm with the provider before seeking any services.

William Tatomer is enrolled in PECOS and is eligible to order or refer health care services for Medicare patients. The provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

What is PECOS?
PECOS is the online Medicare enrollment management system or Provider, Enrollment, Chain and Ownership System. The PECOS system is a database of providers who have registered with CMS as providers or suppliers. PECOS is the primary source of information about verified Medicare professionals. Providers that want to participate in this program need to enroll in PECOS with their NPI number to avoid denied claims.

  • Is the provider registered in PECOS? Yes

  • PECOS PAC ID: 2769513506

    What is the PECOS Associate Control ID?
    A PAC ID is a unique 10-digit number assigned to an individual or organization healthcare provider in PECOS. The PAC ID is used to link together all the provider information, like tax identification numbers and organizational names. A PAC ID can be connected to multiple Enrollment IDs if an individual or organization has enrolled in PECOS more than once.

  • PECOS Enrollment ID: I20100623000440

    What is the Provider Enrollment ID?
    The Enrollment ID is a unique alphanumeric 15-digit code assigned to each new provider's PECOS enrollment application. The Enrollment ID is used to link together all the provider enrollment information like enrollment type, state, provider specialty, and reassignment of benefits.

  • Accepts Medicare Assignment? Maybe

    What does it mean "accepts medicare assignment"?
    When a provider accepts Medicare assignment, the provider agrees to be paid directly by Medicare and to accept the payment amount approved by Medicare. Additionally, the provider agrees to not bill patients for more than the Medicare deductible and coinsurance amounts.
    A provider who doesn't accept assignment may charge you up to 15% over the Medicare-approved amount. This is known as the limiting charge. You may have to pay this amount, or it may be covered by another insurer.

  • Eligible to Order or Refer Part B Clinical Laboratory and Imaging: Yes

  • Eligible to Order or Refer Durable Medical Equipment (DMEPOS): Yes

  • Eligible to Order or Refer a Home Health Agency (HHA): Yes

  • Eligible to Order or Refer Power Mobility Devices: Yes

Areas of Expertise

The following services and procedures, recently provided to Medicare patients, illustrate the range of care this provider offers. This list reflects the variety of services available to all patients visiting the practice and is based on 2022 Medicare dataset. In general, the more frequently a provider treats specific conditions or performs particular procedures, the more experienced they become in addressing similar patient needs. The provider has delivered many of the services listed below to Medicare patients. Please note that this list does not include services provided to patients who are not covered by Medicare.

Established patient office or other outpatient visit, 10-19 minutes

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.

This service was performed 283 times for 37 patients

Psychotherapy with evaluation and management visit, 45 minutes

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.

This service was performed 280 times for 37 patients

Physician Visit Costs

The pricing information below displays the copayment minimum, maximum and average amount that patients under Medicare are charged when visiting this provider as a new or established patient. Please keep in mind that these prices are just for reference purposes, and the actual prices charged by the provider might be different.

For patients covered under private health plans the prices below are also useful as healthcare pricing for private insurance is usually established as a function of Medicare prices. Private insurance covered patients should check their individual plans to determine the exact pricing.

The prices below reflect the costs for new and established patients in the 94401 ZIP code area.

New Patients Visit Costs *

The most utilized procedure code for new patients office visits is 99205

  • Average New Patient Price $202.35
  • Minimum New Patient Price $69
  • Maximum New Patient Price $202.35
  • Average New Patient Copayment $50.58
  • Minimum New Patient Copayment $17.25
  • Maximum New Patient Copayment $50.58

Established Patients Visit Costs *

The most utilized procedure code for established patients office visits is 99213

  • Average Established Patient Price $84.91
  • Minimum Established Patient Price $23.44
  • Maximum Established Patient Price $166.46
  • Average Established Patient Copayment $21.22
  • Minimum Established Patient Copayment $5.86
  • Maximum Established Patient Copayment $41.61

* The physician office visit costs information is generated by statistical analysis of similar providers in the same geographical area. The pricing information above IS NOT the amount charged by this provider.

Reviews for DR. WILLIAM REEVES TATOMER MD

There are currently no reviews for this provider. Be the first person to share your experience with this provider by filling out our review form. Your insights are appreciated and will help others make informed decisions.

NPI Validation Check Digit Calculation


The following table explains the step by step NPI number validation process using the ISO standard Luhn algorithm.

Start with the original NPI number, the last digit is the check digit and is not used in the calculation.
1104862689
Step 1: Double the value of the alternate digits, beginning with the rightmost digit.
21041664616
Step 2: Add all the doubled and unaffected individual digits from step 1 plus the constant number 24.
2 + 1 + 0 + 4 + 1 + 6 + 6 + 4 + 6 + 1 + 6 + 24 = 61
Step 3: Subtract the total obtained in step 2 from the next higher number ending in zero, the result is the check digit.
70 - 61 = 99

The NPI number 1104862689 is valid because the calculated check digit 9 using the Luhn validation algorithm matches the last digit of the original NPI number.

Other Providers at the Same Location


The following 20 providers are registered at the same or nearby location.

NPI Name / Type Taxonomy Address
1528060308DR. JACQUELINE KOO MD
Individual
Ophthalmology101 S SAN MATEO DR SUITE 310
SAN MATEO, CA 94401
(650) 342-7474
1407837693 MARY CATHERINE DOBBINS M.D.
Individual
Internal Medicine101 S SAN MATEO DR SUITE 307
SAN MATEO, CA 94401
(650) 348-6220
1508816596DR. THOMAS ALAN WATTERS M.D.
Individual
Nuclear Medicine (Nuclear Cardiology)101 S SAN MATEO DR SUITE 303
SAN MATEO, CA 94401
(650) 218-5758
1457301384DR. JACK M BERNSTEIN MD
Individual
Internal Medicine101 S SAN MATEO DR
SAN MATEO, CA 94401
(650) 942-7071
1952348260DR. SHARON MARIE STEIN MD
Individual
Radiology (Diagnostic Radiology)101 S SAN MATEO DR SUITE 201
SAN MATEO, CA 94401
(650) 343-1655
1013956978DR. ALLA SRAGETS M.D.
Individual
Obstetrics & Gynecology101 S SAN MATEO DR SUITE 112
SAN MATEO, CA 94401
(650) 344-7799
1114944154DR. ROMMEL HINDOCHA D.C.
Individual
Chiropractor101 S SAN MATEO DR SUITE 200
SAN MATEO, CA 94401
(650) 347-2225
1609883024 MICHAEL J DRINNAN MD
Individual
Ophthalmology101 S SAN MATEO DR SUITE 310
SAN MATEO, CA 94401
(650) 342-7474
1477664795 SUSAN J SPENCER MD
Individual
Obstetrics & Gynecology101 S SAN MATEO DR SUITE 112
SAN MATEO, CA 94401
(650) 344-7799
1376631762CRYSTAL SPRINGS SURGICAL ASSOCIATES, A MEDICAL GROUP, INC.
Organization
Surgery101 S SAN MATEO DR SUITE 302
SAN MATEO, CA 94401
(650) 685-2959
1356425185DR. MICHAEL DAVID GOLDFIELD M.D.
Individual
Psychiatry & Neurology (Forensic Psychiatry)101 S SAN MATEO DR SUITE 300
SAN MATEO, CA 94401
(650) 342-8814
1417032376 JONATHAN GARTH BRISKIN M.D.
Individual
Internal Medicine (Cardiovascular Disease)101 S SAN MATEO DR STE 213
SAN MATEO, CA 94401
(650) 373-0170
1255499323DR. DALE JOSEPH RITZO M.D.
Individual
Internal Medicine101 S SAN MATEO DR SUITE 206
SAN MATEO, CA 94401
(650) 343-4003
1548324536 MARIETA ANGTUACO M.D.
Individual
Specialist101 S SAN MATEO DR SUITE 115
SAN MATEO, CA 94401
(650) 347-9858
1285837906 DORIS BURTON MD
Individual
Radiology (Diagnostic Radiology)101 S SAN MATEO DR
SAN MATEO, CA 94401
(650) 343-1655
1447423504GARY LEE, M.D. & JAMES CHEN M.D., INC.
Organization
Hospitalist101 S SAN MATEO DR
SAN MATEO, CA 94401
(650) 344-6353
1578704045SAN MATEO PHYSICAL THERAPY CENTER
Organization
Clinic/Center (Physical Therapy)101 S SAN MATEO DR 200
SAN MATEO, CA 94401
(650) 994-7800
1669613139CAMPUS PHYSICAL THERAPY INC
Organization
Clinic/Center (Physical Therapy)101 S SAN MATEO DR 200
SAN MATEO, CA 94401
(650) 994-7800
1194959569 DALE JACKNOW
Individual
Pediatrics (Developmental - Behavioral Pediatrics)101 S SAN MATEO DR SUITE 208
SAN MATEO, CA 94401
(650) 342-3137
1548599145PENINSULA SPINE & SPORTS REHAB, A ROMMEL HINDOCHA CHIROPRACTIC CORP.
Organization
Chiropractor101 S SAN MATEO DR SUITE 200
SAN MATEO, CA 94401
(650) 347-2225

Frequently Asked Questions

The NPI number assigned to this healthcare provider is 1104862689, enumerated in the NPI registry as an "individual" on June 21, 2006

The provider is located at 101 S San Mateo Dr Suite 300 San Mateo, Ca 94401 and the phone number is (650) 342-4442

The provider's speciality is Psychiatry & Neurology with taxonomy code 2084P0800X with a focus in Psychiatry

The provider has more than 55 years of experience. He graduated from University Of Virginia School Of Medicine in 1971.

The provider might be accepting Accepts: Medicare and Medicaid. Please consult your insurance carrier or call the provider to make sure your health plan is currently accepted.

Yes, as of June 20, 2025 the provider is registered in PECOS and is eligible to order health care services or supplies for Medicare patients. If you are a beneficiary the provider is eligible to order or refer: Part B Clinical Laboratory and Imaging, Durable Medical Equipment (DME), a Home Health Agency (HHA) and Power Mobility Devices.

Medicare beneficiaries should expect a typical cost of $202.35 with an average copayment of $50.58 for new patient appointments. Established patients should expect a typical charge of $84.91 and an average copayment of 21.22. Please review your insurance plan or contact the provider directly to determine your specific costs.

The most common procedures or services performed by this practitioner are: Established patient office or other outpatient visit, 10-19 minutes and Psychotherapy with evaluation and management visit, 45 minutes.

This NPI record was last updated on June 21, 2006. To officially update your NPI information contact the National Plan and Provider Enumeration System (NPPES) at 1-800-465-3203 (NPI Toll-Free) or by email at [email protected].
NPI Profile data is regularly updated with the latest NPI registry information, if you would like to update or remove your NPI Profile in this website please contact us.