Karen Ayre Rasmussen, M.D.
Family Medicine Physician · Los Alamitos, CA
Karen Ayre Rasmussen, M.D. is a family medicine physician with a practice address in Los Alamitos, California, and NPI 1750510368, issued on Jul 6, 2009. Check the license (California A109736, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Karen Ayre Rasmussen
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- A109736 CA
Self-reported in NPPES; status is on the state search - Practice location
- 3460 Katella Ave, Los Alamitos, CA 90720
- Phone
- (562) 594-6599
- Enumerated
- Jul 6, 2009
- Record last updated
- Nov 25, 2025
- Medicare enrollment
- Enrolled (PECOS I20110926000166); accepts Medicare assignment
- Medical or professional school
- University Of Cincinnati College Of Medicine, 2008
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 17,133 in California → Look up another NPI →
Also registered at 3460 Katella Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Steven Becker, D.O.Internal Medicine Physician1447348628
- Andrea Brown, MDFamily Medicine Physician1710906706
- Daniel Chan, MDFamily Medicine Physician1346260908
- Carol Crawford, NPFamily Nurse Practitioner1114016367
- Ashley Kandu, AGNPNurse Practitioner1467115535
Verify Karen Ayre Rasmussen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license A109736Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
24% more Medicare Part D claims than the average family medicine physician in 2024
4,399 Medicare Part D claims for 494 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 82 claims were for opioids.
Most prescribed
- Atorvastatin Calcium304 claims
- Levothyroxine Sodium256 claims
- Losartan Potassium171 claims
- Amlodipine Besylate152 claims
- Alendronate Sodium117 claims
- Simvastatin111 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 2 group practices
- Centers For Family Medicine GPLos Alamitos, CA
- Healthcare Partners Affiliates Medical GroupLos Alamitos, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Karen Ayre Rasmussen among 17,133 family medicine physician records in California
Karen Ayre Rasmussen, M.D. 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 2009, is newer than 58% of them.
- NPI issued2009 · 58% of these records are older, 40% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2008 · median 2005 among the 10,652 with a school on file
- Record last updated2025 · 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).
18 family medicine physician records list a practice address in Los Alamitos
They are 18 of the 1,035 NPPES records with a practice address in Los Alamitos, and 17,133 family medicine physician records in California.
All 17,133 in California → Every provider in Los Alamitos → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Andrea Brown, MDLos Alamitos, CA 907201710906706
- Daniel Chan, MDLos Alamitos, CA 907201346260908
- Jose De Souza, MDLos Alamitos, CA 907201649299637
- Sandra Goines, D.O.Los Alamitos, CA 907201790756054
- Nancy Helms, PACLos Alamitos, CA 907201407878143
- Gloria Hu, M.D.Los Alamitos, CA 907201396062279
- Jennifer Kim Loomis, D.O.Los Alamitos, CA 907201215136940
- Gregory Kimura, MDLos Alamitos, CA 907201962421958
Common questions
What is Karen Ayre Rasmussen, M.D.'s NPI number?
Karen Ayre Rasmussen, M.D.'s National Provider Identifier (NPI) is 1750510368, issued on Jul 6, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Karen Ayre Rasmussen, M.D. located?
The NPPES record lists a practice address at 3460 Katella Ave, Los Alamitos, CA, 90720. Phone: (562) 594-6599. Providers update this record themselves, so call before visiting.
How can I verify Karen Ayre Rasmussen, M.D.'s license?
NPPES lists California license number A109736, 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 Karen Ayre Rasmussen, M.D. prescribe under Medicare Part D?
In 2024, Karen Ayre Rasmussen, M.D. had 4,399 Medicare Part D claims for 494 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.