MARY GRACE NITRO THOMAS FNP-C
NPI 1093420747
Nurse Practitioner - Family in Duarte, CA
About Mary Grace Nitro Thomas Fnp-c NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MARY GRACE NITRO THOMAS FNP-C (NPI 1093420747) is an individual family provider in Duarte, California, licensed in California (95022511) and active in the NPI registry since January 2023. She is enrolled in Medicare PECOS, maintains a secondary practice location in Rancho Cucamonga, and is a graduate of Other (2022).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Location 1
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
Mary Grace Nitro Thomas Fnp-c 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.
Areas of Expertise CMS Part B claims
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 91010 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DUARTE, CA 91010
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 Mary Grace Thomas's NPI number?
The NPI number for Mary Grace Thomas is 1093420747. It was assigned to this individual provider in the NPPES registry on January 17, 2023.
Where is Mary Grace Thomas located?
Mary Grace Thomas practices at 1500 Duarte Rd, Duarte, CA 91010. The listed phone number is (844) 946-4333.
What is Mary Grace Thomas's specialty?
The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.
Is Mary Grace Thomas enrolled in Medicare?
Yes. Mary Grace 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 Mary Grace Thomas was last updated on November 12, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 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.
# Mary Grace Nitro Thomas, FNP-C · NPI 1093420747
Family physician in Duarte, California. Individual provider, active in the CMS NPPES registry since January 17, 2023.
## Identity
- **NPI:** 1093420747 (Entity type: Individual)
- **Enumerated:** January 17, 2023
- **Primary specialty:** Nurse Practitioner - Family · taxonomy 363LF0000X
- **State license:** 95022511 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1500 DUARTE RD, Duarte, CA 91010-3012
- **Phone:** (844) 946-4333
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Medical school:** Other, class of 2022
## Record status
- **NPPES last updated:** November 12, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1093420747) · Data from the CMS NPPES public registry.