DR. RACHEL M. VILLALON MD
NPI 1083842843
Obstetrics & Gynecology in Fairfield, CA
About Dr. Rachel M. Villalon Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. RACHEL M. VILLALON MD (NPI 1083842843) is an individual obstetrics & gynecology provider in Fairfield, California, licensed in California (A127041) and active in the NPI registry since June 2009. She is enrolled in Medicare PECOS and is a graduate of Other (2009).
NPPES Registry Identity
Specialties & Licenses
Other Names 1
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Rachel M. Villalon Md 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.
Medicare Billing Reassignments
3Medicare enrollment records show Rachel Villalon reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Fairfield, CA 94533
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Northbay Physicians Surgery Center, LLC
- 516 clinicians in this Medicare group
Fairfield, CA 94534
- Reassigned Medicare billing, California enrollment
- 225 clinicians in this Medicare group
Greenville, SC 29607
- Reassigned Medicare billing, California enrollment
- Medicare enrollment name: Obhg California PC
- 711 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
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 94533 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.
FAIRFIELD, CA 94533
FAIRFIELD, CA 94533
FAIRFIELD, CA 94533
FAIRFIELD, CA 94533
FAIRFIELD, CA 94533
FAIRFIELD, CA 94533
FAIRFIELD, CA 94533
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 Rachel Villalon's NPI number?
The NPI number for Rachel Villalon is 1083842843. It was assigned to this individual provider in the NPPES registry on June 30, 2009. The provider is also known as Dr. Rachel Marie Purcell MD.
Where is Rachel Villalon located?
Rachel Villalon practices at 1860 Pennsylvania Ave Suite 300, Fairfield, CA 94533. The listed phone number is (707) 646-4100.
What is Rachel Villalon's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Rachel Villalon enrolled in Medicare?
Yes. Rachel Villalon 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.
Which organizations bill Medicare for Rachel Villalon's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Rachel Villalon reassigns Medicare benefits to 3 organizations: Northbay Healthcare Group (Fairfield, CA), Northbay Health Medical Foundation (Fairfield, CA) and Obhg California, P.C. (Greenville, SC). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Rachel Villalon's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Rachel Villalon was last updated on April 28, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 years 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.
# Dr. Rachel M. Villalon, MD · NPI 1083842843
Obstetrics & Gynecology physician in Fairfield, California. Individual provider, active in the CMS NPPES registry since June 30, 2009.
## Identity
- **NPI:** 1083842843 (Entity type: Individual)
- **Enumerated:** June 30, 2009
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** A127041 (California)
- **Sole proprietor:** No
## Practice location
- **Address:** 1860 PENNSYLVANIA AVE, SUITE 300, Fairfield, CA 94533-3590
- **Phone:** (707) 646-4100 · **Fax:** (707) 646-4101
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Northbay Healthcare Group (NPI 1780736736, Fairfield, CA); Northbay Health Medical Foundation (NPI 1760283527, Fairfield, CA); Obhg California, P.C. (NPI 1215258892, Greenville, SC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2009
## Record status
- **NPPES last updated:** April 28, 2023
- **Other identifiers:** Medicaid 1083842843 (MA)
---
Source: [NPI Profile](https://npiprofile.com/npi/1083842843) · Data from the CMS NPPES public registry.