Quick answers
- Does Darien Heap accept Medicare assignment?
- Yes. Medicare's clinician data says Darien Heap 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 Darien Heap see?
- In 2024, CMS data shows 537 Original Medicare patients and 1,286 services for Darien Heap. This counts Original Medicare only and measures volume, not quality.
- What is Darien Heap's NPI number?
- 1982600961. 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 Darien Heap, 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 | 537 |
|---|---|
| Services billed to Medicare | 1,286 |
| Different services or procedures | 38 |
| Participating Medicare provider | Yes |
| Average age of these patients | 73 |
Most frequent services
- Moderate sedation services provided by the same physician or other qualified health care professional performing a gastrointestinal endoscopic service that sedation supports, requiring the presence of an independent trained observer to assist in the monito (G0500)168 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)160 services
- Removal of polyps or growths of large bowel using an endoscope with mechanical snare (45385)146 services
- Biopsy of large bowel using a flexible endoscope (45380)129 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)127 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 cholesterol69%
- High blood pressure68%
- Arthritis44%
- Diabetes26%
- Ischemic heart disease20%
- Depression19%
Hospitals where Darien Heap works
Medicare's Facility Affiliation Data lists Darien Heap 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.
- Capital Medical CenterOlympia, WA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 500139
- Grays Harbor Community HospitalAberdeen, WA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 500031
- Providence Centralia HospitalCentralia, WA · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 500019
- Summit Pacific Medical CenterElma, WA · Critical Access Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 501304
- Tacoma General Allenmore HospitalTacoma, WA · Acute Care Hospital · Medicare rating: 2 of 5 stars · Emergency services: listed by Medicare · CCN 500129
Practice locations
Addresses where Darien Heap is enrolled with Medicare (CMS data updated October 2, 2026).
- 406 Black Hills Ln SW, Suite AOlympia, WA 98502 (360) 754‑1727
Group practices
Medicare enrollment lists Darien Heap as a member of this group (CMS data updated October 2, 2026).
- Olympia Multi Specialty Clinic21 clinicians in the group
Specialties
- Gastroenterologyprimary
Other gastroenterologists in Olympia
Clinicians with the same Medicare primary specialty in Olympia, WA — not a recommendation.
Other clinicians in Olympia Multi Specialty Clinic
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | Saint Louis University School Of Medicine |
| Graduation year | 1998 (28 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1982600961 |
| 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