Kathryn Amacher, DO
NPI 1366545568 · Geriatric Medicine (Internal Medicine) Physician · Vacaville, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kathryn Amacher, DO is a Geriatric Medicine (Internal Medicine) Physician provider in Vacaville, CA (NPI 1366545568).
Provider details
- NPI number
- 1366545568
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Female
- Sole proprietor
- Yes
- License
- 20A5091 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
4,626 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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 does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 1,359 | $70 |
| Chronic Care Management Services for Two Or More Chronic Conditions, Additional 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99439 | 1,041 | $49 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 418 | $78 |
| Subsequent Nursing Facility Care With Straightforward Level of Medical Decision Making, Per Day, If Using Time, 20 Minutes Or More99308 | 304 | $78 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 203 | $113 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 217 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 601 | 125 |
| Gabapentin | 526 | 94 |
| Apixabanbrand: Eliquis | 495 | 62 |
| Levothyroxine Sodium | 483 | 88 |
| Amlodipine Besylate | 422 | 90 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 392 | 71 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-06
- Last updated
- 2020-03-27
- Certified
- 2020-03-27
Frequently asked questions
- What is Kathryn Amacher's NPI number?
- Kathryn Amacher's National Provider Identifier (NPI) is 1366545568, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kathryn Amacher's specialty?
- Kathryn Amacher is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Kathryn Amacher located?
- Kathryn Amacher's practice location on file with NPPES is 269 Sage Sparrow Cir, Vacaville, CA 95687-7751.
- What is Kathryn Amacher's phone number?
- The practice phone number listed in the NPPES registry for Kathryn Amacher is (707) 451-4111.
- Does Kathryn Amacher accept Medicare?
- Kathryn Amacher is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kathryn Amacher's NPI active?
- Yes — Kathryn Amacher's NPI (1366545568) is active in the NPPES registry as of the last update on 2020-03-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.