Frank Farrell, M.D.
NPI 1891770905 · Specialist · San Francisco, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Frank Farrell, M.D. is a Specialist provider in San Francisco, CA (NPI 1891770905).
Provider details
- NPI number
- 1891770905
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- License
- G68482 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
718 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 127 | $109 |
| 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 | 116 | $58 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 81 | $121 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 81 | $153 |
| Chronic Care Management Services, First 20 Minutes of Clinical Staff Time Directed By Health Care Professional, Per Calendar Month99490 | 73 | $74 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 11 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sodium, Potassium,mag Sulfatesbrand: Sod Sulf-Potass Sulf-Mag Sulf | 189 | 181 |
| Pantoprazole Sodium | 135 | 45 |
| Omeprazole | 86 | 30 |
| Famotidine | 81 | 25 |
| Dicyclomine Hcl | 51 | 18 |
| Mesalamine | 28 | — |
| Peg 3350/Sod Sulf,chlr/Pot/Magbrand: Suflave | 25 | 25 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$305 across 12 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-12
- Last updated
- 2007-07-08
Frequently asked questions
- What is Frank Farrell's NPI number?
- Frank Farrell's National Provider Identifier (NPI) is 1891770905, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frank Farrell's specialty?
- Frank Farrell is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Frank Farrell located?
- Frank Farrell's practice location on file with NPPES is 2186 Geary Blvd, San Francisco, CA 94115-3455.
- What is Frank Farrell's phone number?
- The practice phone number listed in the NPPES registry for Frank Farrell is (415) 749-6900.
- Does Frank Farrell accept Medicare?
- Frank Farrell is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Frank Farrell's NPI active?
- Yes — Frank Farrell's NPI (1891770905) 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.