Frank Linn, M.D.
NPI 1639250327 · Gastroenterology Physician · Concord, MA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Frank Linn, M.D. is a Gastroenterology Physician provider in Concord, MA (NPI 1639250327).
Provider details
- NPI number
- 1639250327
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 58433 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
538 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 134 | $139 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 79 | $98 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 58 | $164 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 52 | $82 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 39 | $121 |
| Colorectal Cancer Screening; Colonoscopy on Individual Not Meeting Criteria for High Risk |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 10 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Omeprazole | 79 | 34 |
| Famotidine | 70 | 36 |
| Ondansetron Hcl | 65 | 65 |
| Pantoprazole Sodium | 60 | 18 |
| Sod Sulf/Pot Chloride/Mag Sulfbrand: Sutab | 23 | 23 |
| Lansoprazole | 21 | — |
| Cholestyramine (with Sugar)brand: Cholestyramine | 20 | — |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,374 across 101 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
- 2006-10-18
- Last updated
- 2007-07-08
Frequently asked questions
- What is Frank Linn's NPI number?
- Frank Linn's National Provider Identifier (NPI) is 1639250327, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Frank Linn's specialty?
- Frank Linn is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Frank Linn located?
- Frank Linn's practice location on file with NPPES is 131 Old Road to Nine Acre Corner, Concord, MA 01742.
- What is Frank Linn's phone number?
- The practice phone number listed in the NPPES registry for Frank Linn is (978) 371-2288.
- Does Frank Linn accept Medicare?
- Frank Linn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Frank Linn's NPI active?
- Yes — Frank Linn's NPI (1639250327) 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.