Joseph Grondahl, MD
NPI 1073691887 · Family Medicine Physician · Vallejo, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joseph Grondahl, MD is a Family Medicine Physician provider in Vallejo, CA (NPI 1073691887).
Provider details
- NPI number
- 1073691887
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- A66118 (CA)
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 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ibuprofen | 21 | 16 |
| Diphth,pertuss(acell),tet Vacbrand: Boostrix Tdap | 17 | 17 |
| Cephalexin | 17 | 17 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 14 | 14 |
| Fluticasone Propionate | 13 | — |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 12 | 12 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-01
- Last updated
- 2021-12-13
Frequently asked questions
- What is Joseph Grondahl's NPI number?
- Joseph Grondahl's National Provider Identifier (NPI) is 1073691887, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joseph Grondahl's specialty?
- Joseph Grondahl is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Joseph Grondahl located?
- Joseph Grondahl's practice location on file with NPPES is 975 Sereno Dr, Vallejo, CA 94589-2441.
- What is Joseph Grondahl's phone number?
- The practice phone number listed in the NPPES registry for Joseph Grondahl is (707) 651-1000.
- Does Joseph Grondahl accept Medicare?
- Joseph Grondahl is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joseph Grondahl's NPI active?
- Yes — Joseph Grondahl's NPI (1073691887) is active in the NPPES registry as of the last update on 2021-12-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.