Merry Lynn Tetef, M.D.
Hematology & Oncology Physician · Laguna Hills, CA
Merry Lynn Tetef, M.D. is a hematology & oncology physician with a practice address in Laguna Hills, California, and NPI 1194784785, issued on Mar 21, 2006. Check the license (California G64196, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Merry Lynn Tetef
- Credential
- M.D.
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- G64196 CA
Self-reported in NPPES; status is on the state search - Practice location
- 24302 Paseo DE Valencia Ste 200, Laguna Hills, CA 92653
- Phone
- (949) 458-8252
- Enumerated
- Mar 21, 2006
- Record last updated
- May 14, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (949) 588-8252
- Medicaid ID
- 1194784785 CA
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Also registered at 24302 Paseo DE Valencia Ste 200
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Aditi Wahi-Singh, LCSW, MPHClinical Social Worker1184556839
Verify Merry Lynn Tetef in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G64196Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
270 Medicare Part D claims for 117 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Anastrozole83 claims
- Ibrance34 claims
- Tamoxifen Citrate32 claims
- Letrozole31 claims
- Gabapentin20 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): 86.1 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).
Merry Lynn Tetef among 1,583 hematology & oncology physician records in California
Merry Lynn Tetef, M.D. is one of 1,583 hematology & oncology physician records with a practice address in California. 83% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 54% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileNo · 71% of these records are
- Record last updated2015 · 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 207RH0003X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Laguna Hills → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Howard Cheng, M.D.Laguna Hills, CA 926531366435299
- Gol Golshani, M.DLaguna Hills, CA 926531629497797
- Yulian Khagi, M.D.Laguna Hills, CA 926531710253638
- Jacqueline Malekirad, M.D.Laguna Hills, CA 926531972892750
- David Okun, M.D.Laguna Hills, CA 926531306839287
- Edward Wagner, M.D.Laguna Hills, CA 926531487799474
- Shi Yu, M.D.Laguna Hills, CA 926531750744967
- Gabor Kovacs, M.D.Laguna Beach, CA 926511215081575
Common questions
What is Merry Lynn Tetef, M.D.'s NPI number?
Merry Lynn Tetef, M.D.'s National Provider Identifier (NPI) is 1194784785, issued on Mar 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Merry Lynn Tetef, M.D. located?
The NPPES record lists a practice address at 24302 Paseo DE Valencia Ste 200, Laguna Hills, CA, 92653. Phone: (949) 458-8252. Providers update this record themselves, so call before visiting.
How can I verify Merry Lynn Tetef, M.D.'s license?
NPPES lists California license number G64196, 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 Merry Lynn Tetef, M.D. prescribe under Medicare Part D?
In 2024, Merry Lynn Tetef, M.D. had 270 Medicare Part D claims for 117 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is Merry Lynn Tetef, M.D.'s MIPS final score?
The 2023 MIPS final score is 86.1 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.