Quick answers
- Does Mara Isser Sax accept Medicare assignment?
- Yes. Medicare's clinician data says Mara Isser Sax 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 Mara Isser Sax see?
- In 2024, CMS data shows 345 Original Medicare patients and 10,782 services for Mara Isser Sax. This counts Original Medicare only and measures volume, not quality.
- What is Mara Isser Sax's NPI number?
- 1194776898. 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 Mara Isser Sax, 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 | 345 |
|---|---|
| Services billed to Medicare | 10,782 |
| Different services or procedures | 44 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Injection, dexamethasone sodium phosphate, 1 mg (J1100)2,510 services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)1,048 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)252 services
- Injection of anesthetic and/or steroid drug into sacral spine nerve root using imaging guidance, single level (64483)114 services
- Injection, betamethasone acetate 3 mg and betamethasone sodium phosphate 3 mg (J0702)107 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).
- Arthritis75%
- High cholesterol71%
- High blood pressure68%
- Osteoporosis29%
- Depression26%
- Ischemic heart disease24%
Hospitals where Mara Isser Sax works
Medicare's Facility Affiliation Data lists Mara Isser Sax 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.
- UCHealth Broomfield HospitalBroomfield, CO · Acute Care Hospital · Emergency services: listed by Medicare · CCN 060129
- University of Colorado Hospital AuthorityAurora, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060024
Practice locations
Addresses where Mara Isser Sax is enrolled with Medicare (CMS data updated October 2, 2026).
- 100 Cook StDenver, CO 80206
- 4404 Barranca Ln, Unit 101Castle Rock, CO 80104 (720) 733‑5260
Group practices
Medicare enrollment lists Mara Isser Sax as a member of this group (CMS data updated October 2, 2026).
- Poudre Valley Medical Group LLC2,440 clinicians in the group
Specialties
Find other Physical Medicine and Rehabilitation doctors in Colorado →
Other rehabilitation doctors in Denver
Clinicians with the same Medicare primary specialty in Denver, CO — not a recommendation.
Other clinicians in Poudre Valley Medical Group LLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | DO |
|---|---|
| Medical school | Michigan State University College Of Osteopathic Medicine |
| Graduation year | 1999 (27 years since medical school) |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1194776898 |
| 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