MONICA NICOLE GAINES STILES DO
NPI 1811524507
Hospitalist in Walnut Creek, CA
About Monica Nicole Gaines Stiles Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MONICA NICOLE GAINES STILES DO (NPI 1811524507) is an individual hospitalist provider in Walnut Creek, California, licensed in California (20A20496) and active in the NPI registry since March 2020. She is enrolled in Medicare PECOS, maintains 2 additional practice locations, and is a graduate of Other (2020).
NPPES Registry Identity
Specialties & Licenses
Secondary Practice Locations 2
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
Monica Nicole Gaines Stiles 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.
Areas of Expertise CMS Part B claims 4
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 94598 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.
WALNUT CREEK, CA 94598
WALNUT CREEK, CA 94598
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 Monica Stiles's NPI number?
The NPI number for Monica Stiles is 1811524507. It was assigned to this individual provider in the NPPES registry on March 24, 2020.
Where is Monica Stiles located?
Monica Stiles practices at 1601 Ygnacio Valley Rd, Walnut Creek, CA 94598. The listed phone number is (925) 947-3393.
What is Monica Stiles's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Monica Stiles enrolled in Medicare?
Yes. Monica Stiles 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 Monica Stiles was last updated on June 18, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 57 days 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.
# Monica Nicole Gaines Stiles, DO · NPI 1811524507
Hospitalist physician in Walnut Creek, California. Individual provider, active in the CMS NPPES registry since March 24, 2020.
## Identity
- **NPI:** 1811524507 (Entity type: Individual)
- **Enumerated:** March 24, 2020
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 20A20496 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1601 YGNACIO VALLEY RD, Walnut Creek, CA 94598-3122
- **Phone:** (925) 947-3393 · **Fax:** (925) 947-3396
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Medical school:** Other, class of 2020
## Record status
- **NPPES last updated:** June 18, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1811524507) · Data from the CMS NPPES public registry.