What is Thomas Grass's NPI number?

Thomas Grass's National Provider Identifier (NPI) is 1457126476, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Thomas Grass's specialty?

Thomas Grass is listed in the NPPES registry with a primary specialty of Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).

Where is Thomas Grass located?

Thomas Grass's practice location on file with NPPES is 530 W Eaton Ave Ste B, Tracy, CA 95376-3454.

What is Thomas Grass's phone number?

The practice phone number listed in the NPPES registry for Thomas Grass is (209) 835-9029.

Is Thomas Grass's NPI active?

Yes — Thomas Grass's NPI (1457126476) is active in the NPPES registry as of the last update on 2026-03-27.

IndividualActive

Thomas Grass

NPI 1457126476 · Physician Assistant · Tracy, CA

Thomas Grass is a Physician Assistant provider in Tracy, CA (NPI 1457126476).

Provider details

NPI number: 1457126476
Entity type: Individual
Primary specialty: Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
Sex: Male
Sole proprietor: No
License: 68101 (CA)

Specialties & taxonomies

Physician AssistantPrimary363A00000XLicense 68101 (CA)
Physician Assistants & Advanced Practice Nursing Providers

Profile Score

Established profile(57/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
2 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

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.

Practice location

530 W Eaton Ave Ste B

Tracy, CA 95376-3454

Phone: (209) 835-9029

Street-level locationGet directions

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Mailing address