THOMAS H WILLIAMS MD
NPI 1700963170
Psychiatry & Neurology - Psychiatry in San Antonio, TX

NPI Status: Active since November 01, 2006

Contact Information

6711 S NEW BRAUNFELS AVE STE 100
SAN ANTONIO, TX
ZIP 78223
Phone: (210) 531-7805
Fax: (210) 531-8172

NPI Profile Information
Primary Taxonomy
Insurance Plans Accepted
NPI Validation
Other Providers Same Location
Frequently Asked Questions

Individual
Male
Psychiatry & Neurology
Psychiatry

About THOMAS WILLIAMS

This page provides the complete NPI Profile along with additional information for Thomas Williams, a provider established in San Antonio, Texas with a medical specialization in Psychiatry & Neurology, focusing in psychiatry . The healthcare provider is registered in the NPI registry with number 1700963170 assigned on November 2006. The practitioner's primary taxonomy code is 2084P0800X with license number C8504 (TX). The provider is registered as an individual and his NPI record was last updated 19 years ago.

NPI: 1700963170
Provider Name: THOMAS H WILLIAMS MD
Gender: Male
Entity Type: Individual
Location Address: 6711 S NEW BRAUNFELS AVE STE 100 SAN ANTONIO, TX 78223
Location Phone: (210) 531-7805
Location Fax: (210) 531-8172
Mailing Address: 6711 S NEW BRAUNFELS AVE STE 100 SAN ANTONIO, TX 78223
Mailing Phone: (210) 531-7805
Mailing Fax: (210) 531-8172
Is Sole Proprietor?: No
Enumeration Date: 11-01-2006
Last Update Date: 07-09-2007
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A psychiatrist like Thomas Williams 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.: C8504
License State: TX
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:

Medicare

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

Medicaid

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
D69271	MEDICARE UPIN (02)	TX
81J156	MEDICARE ID-TYPE UNSPECIFIED (04)	TX	MEDICARE PROVIDER NUMBER

NPI NPI Number Validation

How NPI Validation Works

The NPI validation process uses the ISO-standard Luhn algorithm, a mathematical "handshake", to ensure that a provider's 10-digit ID is authentic and free of common typing errors.

To verify the NPI 1700963170, we treat the final digit (0) as the Check Digit—the target answer we need to reach. The process begins by taking the first nine digits and adding a constant value of 24, which accounts for the "80840" prefix required for all U.S. health identifiers. We then double every other digit starting from the right and sum the individual digits of those results together. For this specific NPI, that total comes to 60. The final step is to find the difference between that total and the next multiple of ten (60 - 60 = 0).

Digit-by-digit view

Use the first nine digits for the calculation. Starting from the right, double every other digit. The last digit is the check digit and is not part of the calculation.

Pos 1

Doubled → 2

Pos 2

Unchanged

Pos 3

Doubled → 0

Pos 4

Unchanged

Pos 5

Doubled → 18 → 1 + 8

Pos 6

Unchanged

Pos 7

Doubled → 6

Pos 8

Unchanged

Pos 9

Doubled → 14 → 1 + 4

Check

Target digit

Regular digit Doubled digit Check digit

Step 1: Double every other digit from the right

Starting with the rightmost digit of the first nine digits, double every other value. If doubling creates a two-digit number, add those digits together.

1 → 2 0 → 0 9 → 18 → 9 3 → 6 7 → 14 → 5

Step 2: Add all digits plus the NPI constant

Add the transformed values, the unchanged digits, and the constant 24.

2 + 7 + 0 + 0 + 1 + 8 + 6 + 6 + 1 + 1 + 4 + 24 = 60

Step 3: Find the amount needed to reach the next multiple of 10

The next multiple of ten after 60 is 60. The difference is the calculated check digit.

60 - 60 = 0

This NPI is valid

The calculated check digit is 0, which matches the last digit of 1700963170.