Joanna Diel-Martin, NP
NPI 1932759461 · Nurse Practitioner · Petaluma, CA
Enrolled with Medicare as Order and Referring Only - Nurse Practitioner · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joanna Diel-Martin, NP is a Nurse Practitioner provider in Petaluma, CA (NPI 1932759461).
Provider details
- NPI number
- 1932759461
- Entity type
- Individual
- Primary specialty
- Nurse PractitionerPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- NP
- Sex
- Female
- Sole proprietor
- No
- License
- 95012708 (CA)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
6 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 · 22 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 59 | 25 |
| Metformin Hcl | 47 | 14 |
| Levothyroxine Sodium | 38 | 15 |
| Gabapentin | 30 | — |
| Losartan Potassium | 25 | — |
| Lisinopril | 24 | — |
| Lisinopril/Hydrochlorothiazide |
Practice location
Mailing address
Additional practice locations (1)
- 2145 University AveBerkeley, CA 94704-1025Phone: (888) 663-6331
Registry dates
- Enumerated
- 2019-09-17
- Last updated
- 2026-05-22
- Certified
- 2026-05-22
Frequently asked questions
- What is Joanna Diel-Martin's NPI number?
- Joanna Diel-Martin's National Provider Identifier (NPI) is 1932759461, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joanna Diel-Martin's specialty?
- Joanna Diel-Martin is listed in the NPPES registry with a primary specialty of Nurse Practitioner (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Joanna Diel-Martin located?
- Joanna Diel-Martin's practice location on file with NPPES is 1179 N Mcdowell Blvd, Petaluma, CA 94954-6559.
- What is Joanna Diel-Martin's phone number?
- The practice phone number listed in the NPPES registry for Joanna Diel-Martin is (707) 559-7500.
- Does Joanna Diel-Martin accept Medicare?
- Joanna Diel-Martin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joanna Diel-Martin's NPI active?
- Yes — Joanna Diel-Martin's NPI (1932759461) is active in the NPPES registry as of the last update on 2026-05-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.