Alexis Williams, MD
NPI 1316111743 · Family Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Alexis Williams, MD is a Family Medicine Physician provider in San Francisco, CA (NPI 1316111743).
Provider details
- NPI number
- 1316111743
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A102689 (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
18 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
169 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 70 | $155 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 38 | $110 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 35 | $78 |
| Administration of Influenza Virus VaccineG0008 | 14 | $2 |
| Admn Sarscov2 Vacc 1 Dose90480 | 12 | $25 |
Typical Medicare-allowed amounts for these services range $2–$155 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 40 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 155 | 48 |
| Amlodipine Besylate | 134 | 44 |
| Hydrochlorothiazide | 49 | 13 |
| Gabapentin | 43 | 12 |
| Lisinopril | 39 | 12 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 38 | — |
| Pantoprazole Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-04-16
- Last updated
- 2008-04-16
Frequently asked questions
- What is Alexis Williams's NPI number?
- Alexis Williams's National Provider Identifier (NPI) is 1316111743, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Alexis Williams's specialty?
- Alexis Williams is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Alexis Williams located?
- Alexis Williams's practice location on file with NPPES is 995 Potrero Ave # Ward83, San Francisco, CA 94110-2859.
- What is Alexis Williams's phone number?
- The practice phone number listed in the NPPES registry for Alexis Williams is (415) 206-4009.
- Does Alexis Williams accept Medicare?
- Alexis Williams is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Alexis Williams's NPI active?
- Yes — Alexis Williams's NPI (1316111743) is active in the NPPES registry as of the last update on 2008-04-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.