Quick answers
- Does Luther F. Cobb accept Medicare assignment?
- Yes. Medicare's clinician data says Luther F. Cobb accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Luther F. Cobb see?
- In 2024, CMS data shows 299 Original Medicare patients and 655 services for Luther F. Cobb. This counts Original Medicare only and measures volume, not quality.
- What is Luther F. Cobb's NPI number?
- 1386668481. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Luther F. Cobb, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 299 |
|---|---|
| Services billed to Medicare | 655 |
| Different services or procedures | 52 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more (99204)129 services
- Biopsy of esophagus, stomach, and/or upper small bowel using a flexible endoscope (43239)70 services
- Biopsy of large bowel using a flexible endoscope (45380)67 services
- Diagnostic exam of large bowel using a flexible endoscope (45378)63 services
- Use of a drug to induce depression of consciousness by physician performing a procedure (5 years or older), initial 15 minutes (99152)54 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure64%
- High cholesterol63%
- Arthritis36%
- Diabetes23%
- Anxiety22%
- Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)21%
Hospitals where Luther F. Cobb works
Medicare's Facility Affiliation Data lists Luther F. Cobb at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Mad River Community HospitalArcata, CA · Acute Care Hospital · Medicare rating: 1 of 5 stars · Emergency services: listed by Medicare · CCN 050028
- Providence St Joseph HospitalEureka, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050006
Practice locations
Addresses where Luther F. Cobb is enrolled with Medicare (CMS data updated October 2, 2026).
- 636 Harris StEureka, CA 95503 (707) 476‑0690
Specialties
- General Surgeryprimary
- Thoracic Surgeryalso
Other general surgeons in Eureka
Clinicians with the same Medicare primary specialty in Eureka, CA — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Stanford University School Of Medicine |
| Graduation year | 1978 (48 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1386668481 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians