Stefan Frolov, MD
Internal Medicine Physician · Laguna Hills, CA
Stefan Frolov, MD is an internal medicine physician with a practice address in Laguna Hills, California, and NPI 1982769733, issued on Dec 22, 2006. Check the license (California G27940, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Stefan Frolov
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- G27940 CA
Self-reported in NPPES; status is on the state search - Practice location
- 24411 Health Center Dr, Laguna Hills, CA 92653
- Phone
- (949) 452-3021
- Enumerated
- Dec 22, 2006
- Record last updated
- May 25, 2016 (not updated in 10 years: call before relying on the address or phone)
- Fax
- (949) 455-1225
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 17,696 in California → Look up another NPI →
Also registered at 24411 Health Center Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Stefan Frolov in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G27940Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
65 Medicare Part D claims for 18 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 20% of 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.
Stefan Frolov among 17,696 internal medicine physician records in California
Stefan Frolov, MD 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 fileNo · 63% of these records are
- Record last updated2016 · 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).
56 internal medicine physician records list a practice address in Laguna Hills
They are 56 of the 2,069 NPPES records with a practice address in Laguna Hills, and 17,696 internal medicine physician records in California.
All 17,696 in California → Every provider in Laguna Hills → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Humberto Boccardo, M.D.Laguna Hills, CA 926531689679458
- Arthur Daigneault, MDLaguna Hills, CA 926531609845361
- Raymond Fernandez, MDLaguna Hills, CA 926531629039532
- Ali Ghazvini, M.D.Laguna Hills, CA 926531104865153
- Brian HenryLaguna Hills, CA 926531629047824
- Robert Lazatin, M.D.Laguna Hills, CA 926531700865755
- Alan Lo, MDLaguna Hills, CA 926531982683637
- Lawrence Luppi, M.D.Laguna Hills, CA 926531952356727
Common questions
What is Stefan Frolov, MD's NPI number?
Stefan Frolov, MD's National Provider Identifier (NPI) is 1982769733, issued on Dec 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Stefan Frolov, MD located?
The NPPES record lists a practice address at 24411 Health Center Dr, Laguna Hills, CA, 92653. Phone: (949) 452-3021. Providers update this record themselves, so call before visiting.
How can I verify Stefan Frolov, MD's license?
NPPES lists California license number G27940, 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 Stefan Frolov, MD prescribe under Medicare Part D?
In 2024, Stefan Frolov, MD had 65 Medicare Part D claims for 18 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.