Quick answers
- Does Richard S. Herdener accept Medicare assignment?
- Medicare's clinician data says Richard S. Herdener may accept Medicare assignment (as of October 2, 2026). Ask the office whether they accept it for your visit.
- How many Medicare patients does Richard S. Herdener see?
- In 2024, CMS data shows 151 Original Medicare patients and 637 services for Richard S. Herdener. This counts Original Medicare only and measures volume, not quality.
- What is Richard S. Herdener's NPI number?
- 1457326365. 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 S. Herdener, 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 | 151 |
|---|---|
| Services billed to Medicare | 637 |
| Different services or procedures | 25 |
| Participating Medicare provider | Yes |
| Average age of these patients | 76 |
Most frequent services
- Destruction of precancer skin growth, 2-14 growths (17003)176 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)122 services
- Destruction of precancer skin growth, 1 growth (17000)68 services
- Destruction of skin growth, 1-14 growths (17110)54 services
- Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more (99212)38 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 pressure66%
- High cholesterol64%
- Arthritis48%
- Ischemic heart disease21%
- Depression21%
- Anxiety21%
Practice locations
Addresses where Richard S. Herdener is enrolled with Medicare (CMS data updated October 2, 2026).
Specialties
- Internal Medicineprimary
- Dermatologyalso
Other internal medicine doctors in Washington
Clinicians with the same Medicare primary specialty in Washington — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Washington School Of Medicine |
| Graduation year | 1976 (50 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | May accept for some services |
| NPI (National Provider Identifier) | 1457326365 |
| 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
- 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