Carol A. Ahern, MD
Family Medicine Physician · Sonoma, CA
Carol A. Ahern, MD is a family medicine physician with a practice address in Sonoma, California, and NPI 1760546915, issued on Dec 21, 2006. Check the license (California G80132, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Carol A. Ahern
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- G80132 CA
Self-reported in NPPES; status is on the state search - Practice location
- 19270 Highway 12, Sonoma, CA 95476
- Phone
- (707) 939-6070
- Enumerated
- Dec 21, 2006
- Record last updated
- Jul 23, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicaid ID
- GR0085520 CA
- Medicare enrollment
- Enrolled (PECOS I20091215000582); may accept Medicare assignment
- Medical or professional school
- University Of California, San Francisco School Of Medicine, 1988
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 19270 Highway 12
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Janet Byrd, FNP-CFamily Nurse Practitioner1225438294
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- Anna Harleman, R.D.Registered Dietitian1053435610
- Amy Huddle, LCSWClinical Social Worker1164780821
- Michael Mabanglo, LCSWClinical Social Worker1558431528
- Michele Reynolds, M.D.Family Medicine Physician1740486190
Verify Carol A. Ahern in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G80132Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
18% fewer Medicare Part D claims than the average family medicine physician in 2024
2,911 Medicare Part D claims for 173 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 16% of claims. 117 claims were for opioids.
Most prescribed
- Atorvastatin Calcium94 claims
- Losartan Potassium90 claims
- Amlodipine Besylate88 claims
- Gabapentin84 claims
- Omeprazole78 claims
- Hydrocodone-Acetaminophen72 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: $92.66
1 payment: food and beverage; the largest payer was Astellas Pharma US Inc. The 55,478 providers of this specialty with any payment received $902.55 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 one group practice
- Sonoma Valley Community Health CenterSonoma, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Carol A. Ahern among 17,133 family medicine physician records in California
Carol A. Ahern, MD is one of 17,133 family medicine physician records with a practice address in California. 81% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 6% of them.
- NPI issued2006 · 6% of these records are older, 59% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1988 · median 2005 among the 10,652 with a school on file
- Record last updated2014 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
20 family medicine physician records list a practice address in Sonoma
They are 20 of the 395 NPPES records with a practice address in Sonoma, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Sonoma → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Clayton Drake, MDSonoma, CA 954761689739039
- Jennifer Hasa, M.D.Sonoma, CA 954761982951851
- Carolyn Ho, MD/MPHSonoma, CA 954761851928154
- Jared Hubbell, M.D.Sonoma, CA 954761538387428
- Robert Koida, M.D.Sonoma, CA 954761275646507
- Geeta Malik, M.D.Sonoma, CA 954761740262302
- Subhash Mishra, MDSonoma, CA 954761285695437
- Ralph Pulverman, D.O.Sonoma, CA 954761093760092
Common questions
What is Carol A. Ahern, MD's NPI number?
Carol A. Ahern, MD's National Provider Identifier (NPI) is 1760546915, issued on Dec 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Carol A. Ahern, MD located?
The NPPES record lists a practice address at 19270 Highway 12, Sonoma, CA, 95476. Phone: (707) 939-6070. Providers update this record themselves, so call before visiting.
How can I verify Carol A. Ahern, MD's license?
NPPES lists California license number G80132, 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 Carol A. Ahern, MD prescribe under Medicare Part D?
In 2024, Carol A. Ahern, MD had 2,911 Medicare Part D claims for 173 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.