Margaret Chen
NPI 1427403617 · Family Medicine Physician · San Francisco, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margaret Chen is a Family Medicine Physician provider in San Francisco, CA (NPI 1427403617).
Provider details
- NPI number
- 1427403617
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Sex
- Female
- Sole proprietor
- No
- License
- A152850 (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
10 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
305 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) |
|---|---|---|
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 66 | $19 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 53 | $109 |
| Online Digital Evaluation and Management Service for an Established Patient for Up to 7 Days, Total Time 5-10 Minutes99421 | 37 | $14 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 35 | $74 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 30 | $162 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 24 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 76 | 28 |
| Levothyroxine Sodium | 45 | 19 |
| Amlodipine Besylate | 31 | 13 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 27 | — |
| Alendronate Sodium | 25 | — |
| Metformin Hcl | 24 | 12 |
| Famotidine |
Practice location
Mailing address
Registry dates
- Enumerated
- 2016-04-26
- Last updated
- 2020-03-02
- Certified
- 2020-03-02
Frequently asked questions
- What is Margaret Chen's NPI number?
- Margaret Chen's National Provider Identifier (NPI) is 1427403617, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margaret Chen's specialty?
- Margaret Chen is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Margaret Chen located?
- Margaret Chen's practice location on file with NPPES is 1001 Potrero Ave Bldg 80-83, San Francisco, CA 94110-2859.
- What is Margaret Chen's phone number?
- The practice phone number listed in the NPPES registry for Margaret Chen is (415) 206-5252.
- Does Margaret Chen accept Medicare?
- Margaret Chen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margaret Chen's NPI active?
- Yes — Margaret Chen's NPI (1427403617) is active in the NPPES registry as of the last update on 2020-03-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.