Quick answers
- Does Richard H. Koehler accept Medicare assignment?
- Yes. Medicare's clinician data says Richard H. Koehler 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 Richard H. Koehler see?
- In 2024, CMS data shows 25 Original Medicare patients and 33 services for Richard H. Koehler. This counts Original Medicare only and measures volume, not quality.
- What is Richard H. Koehler's NPI number?
- 1831146414. 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 Richard H. Koehler, 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 | 25 |
|---|---|
| Services billed to Medicare | 33 |
| Different services or procedures | 18 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
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 cholesterol72%
- High blood pressure56%
Hospitals where Richard H. Koehler works
Medicare's Facility Affiliation Data lists Richard H. Koehler 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.
- Martha's Vineyard Hospital IncOak Bluffs, MA · Critical Access Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 221300
- Nantucket Cottage HospitalNantucket, MA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 220177
Practice locations
Addresses where Richard H. Koehler is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Hospital RdOak Bluffs, MA 02557
- 57 Prospect StNantucket, MA 02554 (508) 825‑8100
Group practices
Medicare enrollment lists Richard H. Koehler as a member of these groups (CMS data updated October 2, 2026).
- Martha's Vineyard Hospital Inc155 clinicians in the group
- Nantucket Cottage Hospital87 clinicians in the group
- Nantucket Physicians Organization21 clinicians in the group
Specialties
- General Surgeryprimary
Other general surgeons in Oak Bluffs
Clinicians with the same Medicare primary specialty in Oak Bluffs, MA — not a recommendation.
Other clinicians in Martha's Vineyard Hospital Inc
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Tufts University School Of Medicine |
| Graduation year | 1982 (44 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1831146414 |
| 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