Mary Ann Carol Besana, MD
NPI 1700894540 · Family Medicine Physician · Napa, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Mary Ann Carol Besana, MD is a Family Medicine Physician provider in Napa, CA (NPI 1700894540).
Provider details
- NPI number
- 1700894540
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- 230393 (NY)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 82 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 347 | 139 |
| Losartan Potassium | 279 | 109 |
| Amlodipine Besylate | 278 | 118 |
| Levothyroxine Sodium | 165 | 62 |
| Atenolol | 129 | 51 |
| Famotidine | 122 | 47 |
| Lisinopril | 115 | 47 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-04
- Last updated
- 2022-01-24
- Certified
- 2022-01-24
Frequently asked questions
- What is Mary Ann Carol Besana's NPI number?
- Mary Ann Carol Besana's National Provider Identifier (NPI) is 1700894540, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mary Ann Carol Besana's specialty?
- Mary Ann Carol Besana is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Mary Ann Carol Besana located?
- Mary Ann Carol Besana's practice location on file with NPPES is 3285 Claremont Way, Napa, CA 94558-3313.
- What is Mary Ann Carol Besana's phone number?
- The practice phone number listed in the NPPES registry for Mary Ann Carol Besana is (707) 258-2166.
- Does Mary Ann Carol Besana accept Medicare?
- Mary Ann Carol Besana is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Mary Ann Carol Besana's NPI active?
- Yes — Mary Ann Carol Besana's NPI (1700894540) is active in the NPPES registry as of the last update on 2022-01-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.