What is Mark Grier's NPI number?

Mark Grier's National Provider Identifier (NPI) is 1407862758, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Mark Grier's specialty?

Mark Grier is listed in the NPPES registry with a primary specialty of Pediatrics Physician (Allopathic & Osteopathic Physicians).

Where is Mark Grier located?

Mark Grier's practice location on file with NPPES is 1301 S, Capital of Texas Hwy, Austin, TX 78746.

What is Mark Grier's phone number?

The practice phone number listed in the NPPES registry for Mark Grier is (512) 328-7666.

Is Mark Grier's NPI active?

Yes — Mark Grier's NPI (1407862758) is active in the NPPES registry as of the last update on 2026-03-24.

IndividualActive

Mark Grier, MD

NPI 1407862758 · Pediatrics Physician · Austin, TX

Mark Grier, MD is a Pediatrics Physician provider in Austin, TX (NPI 1407862758).

Provider details

NPI number: 1407862758
Entity type: Individual
Primary specialty: Pediatrics PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: No
License: M2962 (TX)

Specialties & taxonomies

Pediatrics PhysicianPrimary208000000XLicense M2962 (TX)
Allopathic & Osteopathic Physicians

Profile Score

Detailed profile(91/100 index)

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

Registry tenure38% of score
19 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

1301 S, Capital of Texas Hwy

Building a Ste.230

Austin, TX 78746

Phone: (512) 328-7666

Fax: (572) 276-2939

Street-level locationGet directions

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Mailing address