DR. GRANT HAYES THOMAS DO
NPI 1972253169
Family Medicine in Castle Rock, CO

Active since March 28, 2022PECOS EnrolledAccepts Medicare Assignment
4318 TRAIL BOSS DR, CASTLE ROCK, CO 80104(303) 338-4545 Get Directions Write a Review

NPPES record last updated: August 29, 2025. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Grant Hayes Thomas Do NPPES

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

DR. GRANT HAYES THOMAS DO (NPI 1972253169) is an individual family medicine provider in Castle Rock, Colorado, licensed in Colorado (DR.0074262) and active in the NPI registry since March 2022. He is enrolled in Medicare PECOS, maintains a secondary practice location in Englewood, and is a graduate of Campbell Univ School Of Osteopathic Medicine (2022).

NPPES Registry Identity

NPI1972253169
Entity TypeIndividualMale
Primary Taxonomy207Q00000X
Provider Legal NameDR. GRANT HAYES THOMASCredential: DO
Location Address4318 TRAIL BOSS DRCastle Rock, CO 80104-7512
Mailing Address10350 E Dakota AveDenver, CO 80247-1314
Sole ProprietorNo
Medical School CMSCampbell Univ School Of Osteopathic MedicineGraduated 2022
Enumeration DateMarch 28, 2022
Last NPPES UpdateAugust 29, 2025
NPPES CertifiedAugust 29, 2025
NPI 1972253169 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

Primary SpecialtyFamily MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207Q00000X
License Licensed in CO · DR.0074262
Definition
Family Medicine is the medical specialty which is concerned with the total health care of the individual and the family. It is the specialty in breadth which integrates the biological, clinical, and behavioral sciences. The scope of family medicine is not limited by age, sex, organ system, or disease entity.
4318 TRAIL BOSS DR, Castle Rock, CO 80104

Secondary Practice Location 1

Location 1601 E Hampden Ave Ste 470Englewood, CO 80113-2797 · Phone (303) 788-3100 · Fax (303) 788-3197

Other Identifiers 2

Other029699CO · Kaiser Commercial Number
Medicaid9000207700CO

Medicare Participation & PECOS CMS

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

Medicare Enrollment Status

Enrolled in Medicare and accepts Medicare assignment

Dr. Grant Hayes Thomas Do is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID5597147165
PECOS Enrollment IDI20250911003208
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.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 80104 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
$89.43 typical visit price
range $58.06 – $174.82
Typical copayment $22.35 (range $14.51 – $43.70)
Most-billed visit code 99203
Established Patient
$102.03 typical visit price
range $18.88 – $142.79
Typical copayment $25.50 (range $4.72 – $35.69)
Most-billed visit code 99214
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 13

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

Pharmacy (Managed Care Organization Pharmacy)
4318 TRAIL BOSS DR
CASTLE ROCK, CO 80104
Family Medicine
4318 TRAIL BOSS DR, STE 100
CASTLE ROCK, CO 80104
Registered Nurse (Case Management)
4318 TRAIL BOSS DR
CASTLE ROCK, CO 80104
Clinic/Center
4318 TRAIL BOSS DR, STE 100
CASTLE ROCK, CO 80104
Internal Medicine
4318 TRAIL BOSS DR, SUITE 100
CASTLE ROCK, CO 80104
Family Medicine
4318 TRAIL BOSS DR, SUITE 100
CASTLE ROCK, CO 80104
Physician Assistant
4318 TRAIL BOSS DR, STE 100
CASTLE ROCK, CO 80104
Clinical Medical Laboratory
4318 TRAIL BOSS DR, STE 100
CASTLE ROCK, CO 80104

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 Grant Thomas's NPI number?

The NPI number for Grant Thomas is 1972253169. It was assigned to this individual provider in the NPPES registry on March 28, 2022.

Where is Grant Thomas located?

Grant Thomas practices at 4318 Trail Boss Dr, Castle Rock, CO 80104. The listed phone number is (303) 338-4545.

What is Grant Thomas's specialty?

The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.

Is Grant Thomas enrolled in Medicare?

Yes. Grant Thomas is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

When was this NPI record last updated?

The NPPES record for Grant Thomas was last updated on August 29, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 months 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.