James Ahern, MD
Student in an Organized Health Care Education/Training Program · Ventura, CA
James Ahern, MD is a student in an organized health care education/training program with a practice address in Ventura, California, and NPI 1508359423, issued on Jun 14, 2018. Check the license (California A164158, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- James Ahern
- Credential
- MD
- Primary taxonomy
- Student in an Organized Health Care Education/Training Program 390200000X
- License number
- A164158 CA
Self-reported in NPPES; status is on the state search - Practice location
- 6633 Telephone RD Ste 100, Ventura, CA 93003
- Phone
- (805) 644-9121
- Enumerated
- Jun 14, 2018
- Entity
- Type 1 · individual
Also registered at 6633 Telephone RD Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Larissa Larsen, M.D.Dermatology Physician1063733426
- Travis Welsh, MDRheumatology Physician1821591611
- Nathaniel Yuan, DOSleep Medicine (Internal Medicine) Physician1659875201
Verify James Ahern in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license A164158Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
9.3 times the Medicare Part D claims of the average student in an organized health care education/training program in 2024
4,514 Medicare Part D claims for 464 beneficiaries, against an average of 488 among the 106,422 providers of this specialty who prescribed in Part D. 119 claims were for opioids.
Most prescribed
- Atorvastatin Calcium283 claims
- Levothyroxine Sodium156 claims
- Tamsulosin Hcl155 claims
- Losartan Potassium143 claims
- Rosuvastatin Calcium139 claims
- Amlodipine Besylate137 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.
One hospital or facility affiliation
- The Regents OF The University OF CaliforniaThousand Oaks, CA
Source: CMS Doctors and Clinicians affiliations; Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.
305 student in an organized health care education/training program records list a Ventura practice address
They are 305 of the 4,435 NPPES records with a Ventura practice address, and 49,599 student in an organized health care education/training program records in California.
All 305 in Ventura → All 49,599 in California → Every provider in Ventura →
Other student in an organized health care education/training program records in California
- Sanad A'BasiFresno, CA1720915770
- Alexander Aabedi, MDSan Francisco, CA1245971480
- Andre AabediPomona, CA1891582102
- Natalie Aabodi, DMDPomona, CA1851085187
- Mati Aamed, PSY.D.Pacoima, CA1689285470
- Kjeld Aamodt, DDS, MSSan Francisco, CA1912250176
- Megan Aaronson, MD, MSCRLos Angeles, CA1386272102
- Manas AavulaPomona, CA1972496644
- Louisa AbadaOakland, CA1023502259
- Sharon AbadaSan Francisco, CA1003492844
Common questions
What is James Ahern, MD's NPI number?
James Ahern, MD's National Provider Identifier (NPI) is 1508359423, issued on Jun 14, 2018. An NPI identifies a provider in billing; it is not a license.
Where is James Ahern, MD located?
The NPPES record lists a practice address at 6633 Telephone RD Ste 100, Ventura, CA, 93003. Phone: (805) 644-9121. Providers update this record themselves, so call before visiting.
How can I verify James Ahern, MD's license?
NPPES lists California license number A164158, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does James Ahern, MD prescribe under Medicare Part D?
In 2024, James Ahern, MD had 4,514 Medicare Part D claims for 464 beneficiaries; the average among student in an organized health care education/training program prescribers was 488. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.