Kathryn Holder, M.D.
NPI 1962499392 · Family Medicine Physician · Fairfield, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathryn Holder, M.D. is a Family Medicine Physician provider in Fairfield, CA (NPI 1962499392).
Provider details
- NPI number
- 1962499392
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- MD049016L (PA)
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
20 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 · 33 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 194 | 84 |
| Amlodipine Besylate | 95 | 40 |
| Losartan Potassium | 86 | 38 |
| Losartan/Hydrochlorothiazidebrand: Losartan-Hydrochlorothiazide | 59 | 22 |
| Montelukast Sodium | 52 | 23 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 52 | 34 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-09-30
- Last updated
- 2021-12-21
Frequently asked questions
- What is Kathryn Holder's NPI number?
- Kathryn Holder's National Provider Identifier (NPI) is 1962499392, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathryn Holder's specialty?
- Kathryn Holder is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kathryn Holder located?
- Kathryn Holder's practice location on file with NPPES is 101 Bodin Cir, Fairfield, CA 94535-1809.
- What is Kathryn Holder's phone number?
- The practice phone number listed in the NPPES registry for Kathryn Holder is (707) 423-3765.
- Does Kathryn Holder accept Medicare?
- Kathryn Holder is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathryn Holder's NPI active?
- Yes — Kathryn Holder's NPI (1962499392) is active in the NPPES registry as of the last update on 2021-12-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.