Paul F. Stemmer, MD
Surgery Physician · Big Bear Lake, CA
Paul F. Stemmer, MD is a surgery physician with a practice address in Big Bear Lake, California, and NPI 1891798112, issued on May 31, 2005. Check the license (California G63347, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Paul F. Stemmer
- Credential
- MD
- Primary taxonomy
- Surgery Physician 208600000X
- License number
- G63347 CA
Self-reported in NPPES; status is on the state search - Practice location
- 41820 Garstin Drive, Big Bear Lake, CA 92315
- Phone
- (909) 878-8246
- Enumerated
- May 31, 2005
- Record last updated
- Mar 11, 2026
- Fax
- (909) 878-8294
- Medicare enrollment
- Enrolled (PECOS I20070501000702); accepts Medicare assignment
- Medical or professional school
- University Of California, Irvine, California College Of Medicine, 1986
- Entity
- Type 1 · individual
8 nearest surgery physician records → All 3,118 in California → Look up another NPI →
Also registered at 41820 Garstin Drive
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Paul Kalfell, PNPPediatric Nurse Practitioner1710422126
- Nichole McGivneyCommunity Health Worker1437554375
- Angelica Rodriguez PachecoCommunity Health Worker1790565760
- Johanna WierzbickiCommunity Health Worker1326828302
Verify Paul F. Stemmer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G63347Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
88% fewer Medicare Part D claims than the average surgery physician in 2024
18 Medicare Part D claims, against an average of 147 among the 20,115 providers of this specialty who prescribed in Part D.
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
- Bear Valley Community Health Care DistrictBig Bear Lake, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Paul F. Stemmer among 3,118 surgery physician records in California
Paul F. Stemmer, MD is one of 3,118 surgery physician records with a practice address in California. 75% 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 · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 61% of these records are
- Graduated1986 · median 2003 among the 1,901 with a school on file
- Record last updated2026 · 59% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208600000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Surgery Physician providers in California
There are 3,118 surgery physician records in California.
All 3,118 in California → Every provider in Big Bear Lake → Surgery Physician nationwide →
The 8 surgery physician records with the nearest ZIP codes
- Vardan PapoianBarstow, CA 923111336567908
- Arturo Santos, MDBarstow, CA 923111205839859
- Nathan Chung, MDApple Valley, CA 923081144249152
- Ramanan Umakanthan, MDApple Valley, CA 923081700377413
- Vincent Ajanwachuku, M.D.Apple Valley, CA 923071427127075
- Rao Daluvoy, MDApple Valley, CA 923071003902081
- Peter Fischl, MALApple Valley, CA 923071841374055
- Rakesh Grover, MDApple Valley, CA 923071790836153
Common questions
What is Paul F. Stemmer, MD's NPI number?
Paul F. Stemmer, MD's National Provider Identifier (NPI) is 1891798112, issued on May 31, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Paul F. Stemmer, MD located?
The NPPES record lists a practice address at 41820 Garstin Drive, Big Bear Lake, CA, 92315. Phone: (909) 878-8246. Providers update this record themselves, so call before visiting.
How can I verify Paul F. Stemmer, MD's license?
NPPES lists California license number G63347, 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 Paul F. Stemmer, MD prescribe under Medicare Part D?
In 2024, Paul F. Stemmer, MD had 18 Medicare Part D claims; the average among surgery physician prescribers was 147. 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.