DR. PAUL F. STEMMER MD
NPI 1891798112
Surgery in Big Bear Lake, CA
About Dr. Paul F. Stemmer Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. PAUL F. STEMMER MD (NPI 1891798112) is an individual surgery provider in Big Bear Lake, California, licensed in California (G63347) and active in the NPI registry since May 2005. He is enrolled in Medicare PECOS and is a graduate of University Of California, Irvine, California College Of Medicine (1986).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Paul F. Stemmer Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignment
Medicare enrollment records show Paul Stemmer reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Big Bear Lake, CA 92315
- Reassigned Medicare billing, California enrollment
- 8 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Physician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 92315 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 6
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
BIG BEAR LAKE, CA 92315
BIG BEAR LAKE, CA 92315
BIG BEAR LAKE, CA 92315
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Paul Stemmer's NPI number?
The NPI number for Paul Stemmer is 1891798112. It was assigned to this individual provider in the NPPES registry on May 31, 2005.
Where is Paul Stemmer located?
Paul Stemmer practices at 41820 Garstin Drive PO Box 1649, Big Bear Lake, CA 92315. The listed phone number is (909) 878-8246.
What is Paul Stemmer's specialty?
The primary specialty registered for this NPI is Surgery with taxonomy code 208600000X.
Is Paul Stemmer enrolled in Medicare?
Yes. Paul Stemmer is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organization bills Medicare for Paul Stemmer's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Paul Stemmer reassigns Medicare benefits to Bear Valley Community Health Care District (Big Bear Lake, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Paul Stemmer's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Paul Stemmer was last updated on March 11, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Paul F. Stemmer, MD · NPI 1891798112
Surgery physician in Big Bear Lake, California. Individual provider, active in the CMS NPPES registry since May 31, 2005.
## Identity
- **NPI:** 1891798112 (Entity type: Individual)
- **Enumerated:** May 31, 2005
- **Primary specialty:** Surgery · taxonomy 208600000X
- **State license:** G63347 (California)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 41820 GARSTIN DRIVE, PO BOX 1649, Big Bear Lake, CA 92315
- **Phone:** (909) 878-8246 · **Fax:** (909) 878-8294
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Bear Valley Community Health Care District (NPI 1073553756, Big Bear Lake, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of California, Irvine, California College Of Medicine, class of 1986
## Record status
- **NPPES last updated:** March 11, 2026
- **Other identifiers:** Other G63347 (CA)
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Source: [NPI Profile](https://npiprofile.com/npi/1891798112) · Data from the CMS NPPES public registry.