Patrick C. Ahearn, MD
Nephrology Physician · Stanford, CA
Patrick C. Ahearn, MD is a nephrology physician with a practice address in Stanford, California, and NPI 1972878072, issued on Mar 21, 2012. Check the license (California A129551, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Patrick C. Ahearn
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License number
- A129551 CA
Self-reported in NPPES; status is on the state search - Practice location
- 300 Pasteur Dr, Stanford, CA 94305
- Phone
- (650) 723-4000
- Enumerated
- Mar 21, 2012
- Record last updated
- Apr 17, 2024
- Medicare enrollment
- Enrolled (PECOS I20180717003588); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 1,468 in California → Look up another NPI →
Also registered at 300 Pasteur Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Patrick C. Ahearn in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A129551Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
10% fewer Medicare Part D claims than the average nephrology physician in 2024
1,317 Medicare Part D claims for 106 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 11% of claims.
Most prescribed
- Amlodipine Besylate114 claims
- Losartan Potassium111 claims
- Carvedilol105 claims
- Prednisone88 claims
- Tacrolimus75 claims
- Atorvastatin Calcium67 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 76.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
One hospital affiliation
- Stanford Health CareStanford, CA · Acute Care Hospitals5 of 5 stars
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
Patrick C. Ahearn among 1,468 nephrology physician records in California
Patrick C. Ahearn, MD is one of 1,468 nephrology physician records with a practice address in California. 88% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 80% of them.
- NPI issued2012 · 80% of these records are older, 17% newer
- In a Medicare fileYes · 88% of these records are
- In the CMS Doctors and Clinicians fileYes · 77% of these records are
- Graduated2012 · median 2001 among the 1,128 with a school on file
- Record last updated2024 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in California
There are 1,468 nephrology physician records in California.
All 1,468 in California → Every provider in Stanford → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Shuchi Anand, MDStanford, CA 943051932238326
- Vivek Bhalla, MDStanford, CA 943051730118738
- Tara Chang, MDStanford, CA 943051437166592
- Glenn Chertow, MDStanford, CA 943051407823875
- Enrica Fung, MDStanford, CA 943051437338951
- Richard Lafayette, M.D.Stanford, CA 943051922141951
- Fadi Lakkis, MDStanford, CA 943051417175910
- Maha Mohamed, MDStanford, CA 943051750336459
Common questions
What is Patrick C. Ahearn, MD's NPI number?
Patrick C. Ahearn, MD's National Provider Identifier (NPI) is 1972878072, issued on Mar 21, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Patrick C. Ahearn, MD located?
The NPPES record lists a practice address at 300 Pasteur Dr, Stanford, CA, 94305. Phone: (650) 723-4000. Providers update this record themselves, so call before visiting.
How can I verify Patrick C. Ahearn, MD's license?
NPPES lists California license number A129551, 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 Patrick C. Ahearn, MD prescribe under Medicare Part D?
In 2024, Patrick C. Ahearn, MD had 1,317 Medicare Part D claims for 106 beneficiaries; the average among nephrology physician prescribers was 1,465. Part D covers Medicare prescriptions only.
What is Patrick C. Ahearn, MD's MIPS final score?
The 2023 MIPS final score is 76.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.