Kenneth Grullon, MD
NPI 1801974977 · Obstetrics & Gynecology Physician · Antioch, CA
Enrolled with Medicare as Practitioner - Obstetrics/Gynecology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kenneth Grullon, MD is a Obstetrics & Gynecology Physician provider in Antioch, CA (NPI 1801974977).
Provider details
- NPI number
- 1801974977
- Entity type
- Individual
- Primary specialty
- Obstetrics & Gynecology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- G76376 (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 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Trospium Chloride | 58 | 23 |
| Nitrofurantoin Monohyd/M-Crystbrand: Nitrofurantoin Mono-Macro | 47 | 32 |
| Estradiolbrand: Yuvafem | 26 | — |
| Trospium Chloridebrand: Trospium Chloride Er | 24 | — |
| Methenamine Hippurate | 20 | — |
| Estradiol | 17 | — |
| Mirabegronbrand: Myrbetriq | 16 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-11-02
- Last updated
- 2021-12-17
Frequently asked questions
- What is Kenneth Grullon's NPI number?
- Kenneth Grullon's National Provider Identifier (NPI) is 1801974977, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kenneth Grullon's specialty?
- Kenneth Grullon is listed in the NPPES registry with a primary specialty of Obstetrics & Gynecology Physician (Allopathic & Osteopathic Physicians).
- Where is Kenneth Grullon located?
- Kenneth Grullon's practice location on file with NPPES is 3400 Delta Fair Blvd, Antioch, CA 94509-4004.
- What is Kenneth Grullon's phone number?
- The practice phone number listed in the NPPES registry for Kenneth Grullon is (925) 779-5000.
- Does Kenneth Grullon accept Medicare?
- Kenneth Grullon is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kenneth Grullon's NPI active?
- Yes — Kenneth Grullon's NPI (1801974977) is active in the NPPES registry as of the last update on 2021-12-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.