Colleen A. Aitken, MD
Family Medicine Physician · Westley, CA
Colleen A. Aitken, MD is a family medicine physician with a practice address in Westley, California, and NPI 1811995293, issued on Jul 11, 2005. Check the license (California A68298, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Colleen A. Aitken
- Credential
- MD
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A68298 CA
Self-reported in NPPES; status is on the state search - Practice location
- 301 Howard RD, Westley, CA 95387
- Phone
- (209) 894-3141
- Enumerated
- Jul 11, 2005
- Record last updated
- Mar 7, 2023
- Fax
- (209) 894-3082
- Medicare enrollment
- Enrolled (PECOS I20041118001028); accepts Medicare assignment
- Medical or professional school
- Icahn School Of Medicine At Mount Sinai, 1997
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 301 Howard RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Yazmin MorenoSchool Counselor1770461147
Verify Colleen A. Aitken in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A68298Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
53% fewer Medicare Part D claims than the average family medicine physician in 2024
1,683 Medicare Part D claims for 170 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 18% of claims.
Most prescribed
- Atorvastatin Calcium193 claims
- Metformin Hcl122 claims
- Amlodipine Besylate88 claims
- Omeprazole69 claims
- Lisinopril61 claims
- Glimepiride56 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.
Bills Medicare through one group practice
- Golden Valley Health CentersWestley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Colleen A. Aitken among 17,133 family medicine physician records in California
Colleen A. Aitken, 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 94% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated1997 · median 2005 among the 10,652 with a school on file
- Record last updated2023 · 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).
Family Medicine Physician providers in California
There are 17,133 family medicine physician records in California.
All 17,133 in California → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Diana Oviedo-Cavazos, M.D.Winton, CA 953881477992584
- Ralph Groves, M.D.Yosemite, CA 953891679652218
- Valerie Ohman, M.D.Yosemite National Park, CA 953891124109525
- Curtis Allen, MDTwain Harte, CA 953831336228329
- Marsha McKay, D.O.Twain Harte, CA 953831558384206
- Christine Battaglia, D.O.Turlock, CA 953821558657106
- Tarnpreet Chahal, MDTurlock, CA 953821790305902
- Edmond Ghahramani, M.D.Turlock, CA 953821982800199
Common questions
What is Colleen A. Aitken, MD's NPI number?
Colleen A. Aitken, MD's National Provider Identifier (NPI) is 1811995293, issued on Jul 11, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Colleen A. Aitken, MD located?
The NPPES record lists a practice address at 301 Howard RD, Westley, CA, 95387. Phone: (209) 894-3141. Providers update this record themselves, so call before visiting.
How can I verify Colleen A. Aitken, MD's license?
NPPES lists California license number A68298, 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 Colleen A. Aitken, MD prescribe under Medicare Part D?
In 2024, Colleen A. Aitken, MD had 1,683 Medicare Part D claims for 170 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.