Catherine Gentemann, M.D.
Internal Medicine Physician · Huntington Beach, CA
Catherine Gentemann, M.D. is an internal medicine physician with a practice address in Huntington Beach, California, and NPI 1215043526, issued on Aug 21, 2006. Check the license (California G081721, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Catherine Gentemann
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G081721 CA
Self-reported in NPPES; status is on the state search - Practice location
- 17762 Beach Blvd, Huntington Beach, CA 92647
- Phone
- (714) 848-0080
- Enumerated
- Aug 21, 2006
- Record last updated
- Mar 9, 2017 (not updated in 9 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20080123000679); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 17762 Beach Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Catherine Gentemann in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G081721Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
43% more Medicare Part D claims than the average internal medicine physician in 2024
4,547 Medicare Part D claims for 395 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 66 claims were for opioids.
Most prescribed
- Atorvastatin Calcium281 claims
- Levothyroxine Sodium230 claims
- Rosuvastatin Calcium203 claims
- Losartan Potassium172 claims
- Amlodipine Besylate156 claims
- Lisinopril101 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
- Memorialcare Medical FoundationFountain Valley, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Catherine Gentemann among 17,696 internal medicine physician records in California
Catherine Gentemann, M.D. is one of 17,696 internal medicine physician records with a practice address in California. 79% 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 5% of them.
- NPI issued2006 · 5% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 63% of these records are
- Graduated1993 · median 2004 among the 11,065 with a school on file
- Record last updated2017 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
48 internal medicine physician records list a practice address in Huntington Beach
They are 48 of the 4,031 NPPES records with a practice address in Huntington Beach, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Huntington Beach → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Chin Cha Cheng, MDHuntington Beach, CA 926471225191083
- Julie Copon, D.O.Huntington Beach, CA 926471578568564
- Jillian Gray, D.O.Huntington Beach, CA 926471639296957
- Daniel Hilton, MDHuntington Beach, CA 926471093811358
- Michael Le, M.D.Huntington Beach, CA 926471750332409
- Evelyne Llorente, MDHuntington Beach, CA 926471306926423
- Scott Mancuso, M.D.Huntington Beach, CA 926471962497024
- Nannette Mitchell, M.D.Huntington Beach, CA 926471780655886
Common questions
What is Catherine Gentemann, M.D.'s NPI number?
Catherine Gentemann, M.D.'s National Provider Identifier (NPI) is 1215043526, issued on Aug 21, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Catherine Gentemann, M.D. located?
The NPPES record lists a practice address at 17762 Beach Blvd, Huntington Beach, CA, 92647. Phone: (714) 848-0080. Providers update this record themselves, so call before visiting.
How can I verify Catherine Gentemann, M.D.'s license?
NPPES lists California license number G081721, 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 Catherine Gentemann, M.D. prescribe under Medicare Part D?
In 2024, Catherine Gentemann, M.D. had 4,547 Medicare Part D claims for 395 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.