Rachel M. Villalon, MD
Obstetrics & Gynecology Physician · Fairfield, CA
Rachel M. Villalon, MD is an obstetrics & gynecology physician with a practice address in Fairfield, California, and NPI 1083842843, issued on Jun 30, 2009. Check the license (California A127041, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rachel M. Villalon
- Credential
- MD
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License numbers
- A127041 CA
256434 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1860 Pennsylvania Ave, Fairfield, CA 94533
- Phone
- (707) 646-4100
- Enumerated
- Jun 30, 2009
- Record last updated
- Apr 28, 2023
- Fax
- (707) 646-4101
- Medicaid ID
- 1083842843 MA
- Medicare enrollment
- Enrolled (PECOS I20140811002378); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 5,088 in California → Look up another NPI →
Also registered at 1860 Pennsylvania Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Rachel M. Villalon in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A127041Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
73 Medicare Part D claims for 28 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 29% of claims.
Most prescribed
- Estradiol24 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $141.75
4 payments; by number, the most common kind was food and beverage; the largest payer was Hologic Sales and Service, LLC. The 21,429 providers of this specialty with any payment received $1,030.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through 2 group practices
- Northbay Health Medical FoundationVacaville, CA
- Northbay Physicians Surgery Center, LLCFairfield, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rachel M. Villalon among 5,088 obstetrics & gynecology physician records in California
Rachel M. Villalon, MD is one of 5,088 obstetrics & gynecology physician records with a practice address in California. 74% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 66% of them.
- NPI issued2009 · 66% of these records are older, 30% newer
- In a Medicare fileYes · 74% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2009 · median 2004 among the 2,700 with a school on file
- Record last updated2023 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in California
There are 5,088 obstetrics & gynecology physician records in California.
All 5,088 in California → Every provider in Fairfield → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Frederick Blair, M.D.Fairfield, CA 945331386731768
- Henry Chang, MDFairfield, CA 945331538247374
- Ruth Hahn, MDFairfield, CA 945331528118262
- Sangeeta Joshi, MDFairfield, CA 945331265510838
- Parveen Khan, MDFairfield, CA 945331194927392
- Andrew Lin, M.D.Fairfield, CA 945331689617565
- Pantea Pahlavan, M.D.Fairfield, CA 945331427021583
- Destiny Phillips, MDFairfield, CA 945331871236158
Common questions
What is Rachel M. Villalon, MD's NPI number?
Rachel M. Villalon, MD's National Provider Identifier (NPI) is 1083842843, issued on Jun 30, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Rachel M. Villalon, MD located?
The NPPES record lists a practice address at 1860 Pennsylvania Ave, Fairfield, CA, 94533. Phone: (707) 646-4100. Providers update this record themselves, so call before visiting.
How can I verify Rachel M. Villalon, MD's license?
NPPES lists California license number A127041, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Rachel M. Villalon, MD prescribe under Medicare Part D?
In 2024, Rachel M. Villalon, MD had 73 Medicare Part D claims for 28 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.