Quick answers
- Does Mary K. Peiffer accept Medicare assignment?
- Yes. Medicare's clinician data says Mary K. Peiffer 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 Mary K. Peiffer see?
- In 2024, CMS data shows 326 Original Medicare patients and 1,859 services for Mary K. Peiffer. This counts Original Medicare only and measures volume, not quality.
- What is Mary K. Peiffer's NPI number?
- 1790454601. 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 Mary K. Peiffer, 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 | 326 |
|---|---|
| Services billed to Medicare | 1,859 |
| Different services or procedures | 35 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's (G2211)493 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)314 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)213 services
- Automated urinalysis test (81003)114 services
- Ultrasound measurement of bladder capacity after voiding (51798)94 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 cholesterol75%
- High blood pressure74%
- Arthritis52%
- Ischemic heart disease35%
- Chronic kidney disease29%
- Diabetes26%
Hospitals where Mary K. Peiffer works
Medicare's Facility Affiliation Data lists Mary K. Peiffer 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.
- AdventHealth LittletonLittleton, CO · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 060113
- Sky Ridge Medical CenterLone Tree, CO · Acute Care Hospital · Medicare rating: 3 of 5 stars · Emergency services: listed by Medicare · CCN 060112
Practice locations
Addresses where Mary K. Peiffer is enrolled with Medicare (CMS data updated October 2, 2026).
- 10450 Park Meadows Dr, Suite 202Lone Tree, CO 80124 (303) 733‑8848
- 400 Indiana St, Suite 340Golden, CO 80401 (720) 452‑1267
- 7720 S Broadway, Suite 500Littleton, CO 80122 (303) 733‑8848
Group practices
Medicare enrollment lists Mary K. Peiffer as a member of these groups (CMS data updated October 2, 2026).
- Select Physical Therapy of West Denver Limited Partnership548 clinicians in the group
- Urology Associates Inc22 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Lone Tree
Clinicians with the same Medicare primary specialty in Lone Tree, CO — not a recommendation.
Other clinicians in Select Physical Therapy of West Denver Limited Partnership
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | NP |
|---|---|
| Graduation year | 2021 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1790454601 |
| 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