Quick answers
- Does Hendrik Ryan L. Tan accept Medicare assignment?
- Yes. Medicare's clinician data says Hendrik Ryan L. Tan 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 Hendrik Ryan L. Tan see?
- In 2024, CMS data shows 88 Original Medicare patients and 231 services for Hendrik Ryan L. Tan. This counts Original Medicare only and measures volume, not quality.
- What is Hendrik Ryan L. Tan's NPI number?
- 1316561871. 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 Hendrik Ryan L. Tan, 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 | 88 |
|---|---|
| Services billed to Medicare | 231 |
| Different services or procedures | 40 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Removal of fingernails or toenails, 6 or more nails (11721)52 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)33 services
- X-ray of foot, minimum of 3 views (73630)24 services
- Removal of tissue from wound, 20.0 sq cm or less (97597)15 services
- Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes (99222)11 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 pressure75%
- High cholesterol75%
- Arthritis65%
- Diabetes55%
- Chronic kidney disease43%
- Heart failure33%
Hospitals where Hendrik Ryan L. Tan works
Medicare's Facility Affiliation Data lists Hendrik Ryan L. Tan 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.
- Adventist Health ClearlakeClearlake, CA · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 051317
- Adventist Health Howard MemorialWillits, CA · Critical Access Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 051310
- Adventist Health Mendocino CoastFort Bragg, CA · Critical Access Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 051325
- Adventist Health St HelenaSaint Helena, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050013
- Adventist Health Ukiah ValleyUkiah, CA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 050301
Practice locations
Addresses where Hendrik Ryan L. Tan is enrolled with Medicare (CMS data updated October 2, 2026).
- 1 Marcela DrWillits, CA 95490 (707) 459‑6801
- 232 Hospital Dr, Suite AUkiah, CA 95482 (707) 467‑3189
- 275 Hospital DrUkiah, CA 95482 (707) 462‑3111
- 3 Marcela Dr, Suite DWillits, CA 95490 (707) 459‑4220
Group practices
Medicare enrollment lists Hendrik Ryan L. Tan as a member of these groups (CMS data updated October 2, 2026).
- Adventist Health Physicians Network628 clinicians in the group
- Ukiah Adventist Hospital135 clinicians in the group
- Willits Hospital Inc67 clinicians in the group
Specialties
- Podiatryprimary
Other podiatrists in California
Clinicians with the same Medicare primary specialty in California — not a recommendation.
Other clinicians in Adventist Health Physicians Network
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DPM |
|---|---|
| Graduation year | 2020 (6 years since podiatric medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1316561871 |
| 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