Kirsten Day, MD
NPI 1730270323 · Family Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Kirsten Day, MD is a Family Medicine Physician provider in San Francisco, CA (NPI 1730270323).
Provider details
- NPI number
- 1730270323
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- G72692 (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 · 18 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Morphine Sulfatebrand: Morphine Sulfate Er | 39 | — |
| Atorvastatin Calcium | 36 | 14 |
| Oxycodone Hcl | 28 | — |
| Gabapentin | 22 | — |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 21 | — |
| Metformin Hcl | 20 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-09-27
- Last updated
- 2007-07-08
Frequently asked questions
- What is Kirsten Day's NPI number?
- Kirsten Day's National Provider Identifier (NPI) is 1730270323, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Kirsten Day's specialty?
- Kirsten Day is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Kirsten Day located?
- Kirsten Day's practice location on file with NPPES is 1001 Potrero Avenue, San Francisco, CA 94110-3518.
- What is Kirsten Day's phone number?
- The practice phone number listed in the NPPES registry for Kirsten Day is (415) 206-8651.
- Does Kirsten Day accept Medicare?
- Kirsten Day is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Kirsten Day's NPI active?
- Yes — Kirsten Day's NPI (1730270323) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.