Margo Estrin, M.D.
NPI 1891840096 · Internal Medicine Physician · Danville, CA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Margo Estrin, M.D. is a Internal Medicine Physician provider in Danville, CA (NPI 1891840096).
Provider details
- NPI number
- 1891840096
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- Yes
- License
- G40199 (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
332 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 218 | $104 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 74 | $204 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 | 22 | $17 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 18 | $146 |
Typical Medicare-allowed amounts for these services range $17–$204 (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 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 134 | 33 |
| Atorvastatin Calcium | 132 | 31 |
| Sertraline Hcl | 83 | 14 |
| Gabapentin | 82 | 17 |
| Atenolol | 66 | 14 |
| Lisinopril | 60 | 13 |
| Amlodipine Besylate | 53 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-25
- Last updated
- 2007-07-08
Frequently asked questions
- What is Margo Estrin's NPI number?
- Margo Estrin's National Provider Identifier (NPI) is 1891840096, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Margo Estrin's specialty?
- Margo Estrin is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Margo Estrin located?
- Margo Estrin's practice location on file with NPPES is 901 San Ramon Valley Blvd, Danville, CA 94526-4034.
- What is Margo Estrin's phone number?
- The practice phone number listed in the NPPES registry for Margo Estrin is (925) 837-6006.
- Does Margo Estrin accept Medicare?
- Margo Estrin is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Margo Estrin's NPI active?
- Yes — Margo Estrin's NPI (1891840096) 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.