DR. MARY ANN CAROL CARLOS BESANA I MD
NPI 1700894540
Family Medicine in Napa, CA
About Dr. Mary Ann Carol Carlos Besana I Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. MARY ANN CAROL CARLOS BESANA I MD (NPI 1700894540) is an individual family medicine provider in Napa, California, licensed in New York (230393) and active in the NPI registry since August 2006. She is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Names 1
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 (PECOS)
Dr. Mary Ann Carol Carlos Besana I Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignment
Medicare enrollment records show Mary Ann Carol Besana reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Vallejo, CA 94589
- Reassigned Medicare billing, California enrollment
- 20,078 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 94558 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 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
NAPA, CA 94558
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 Mary Ann Carol Besana's NPI number?
The NPI number for Mary Ann Carol Besana is 1700894540. It was assigned to this individual provider in the NPPES registry on August 4, 2006. The provider is also known as Mary Ann Carol Carlos Besana M.D..
Where is Mary Ann Carol Besana located?
Mary Ann Carol Besana practices at 3285 Claremont Way Medicine 3, Napa, CA 94558. The listed phone number is (707) 258-2166.
What is Mary Ann Carol Besana's specialty?
The primary specialty registered for this NPI is Family Medicine with taxonomy code 207Q00000X.
Is Mary Ann Carol Besana enrolled in Medicare?
Yes. Mary Ann Carol Besana is registered in the Medicare PECOS enrollment system.
Which organization bills Medicare for Mary Ann Carol Besana's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Mary Ann Carol Besana reassigns Medicare benefits to Permanente Medical Group Inc (Vallejo, 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 Mary Ann Carol Besana'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 Mary Ann Carol Besana was last updated on January 24, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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. Mary Ann Carol Carlos Besana I, MD · NPI 1700894540
Family Medicine physician in Napa, California. Individual provider, active in the CMS NPPES registry since August 4, 2006.
## Identity
- **NPI:** 1700894540 (Entity type: Individual)
- **Enumerated:** August 4, 2006
- **Primary specialty:** Family Medicine · taxonomy 207Q00000X
- **State license:** 230393 (New York)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 3285 CLAREMONT WAY, MEDICINE 3, Napa, CA 94558-3313
- **Phone:** (707) 258-2166
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Permanente Medical Group Inc (NPI 1336222397, Vallejo, CA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** January 24, 2022
- **Other identifiers:** Medicaid 02527791 (NY)
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Source: [NPI Profile](https://npiprofile.com/npi/1700894540) · Data from the CMS NPPES public registry.