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Anesthesiology

Sara P. Merrill, MD

Works at hospitals in Parker, CO · Colorado

Summary

Dr. Sara P. Merrill, MD is an anesthesiologist at 9395 Crown Crest Blvd, Parker, CO 80138. Phone: (303) 438-3999. Accepts Medicare assignment. In 2024, Sara P. Merrill had 110 Original Medicare patients and 112 services. NPI 1538141353. Source: CMS National Downloadable File, updated October 2, 2026; CMS Facility Affiliation Data, updated October 2, 2026; CMS Medicare Physician & Other Practitioners, data year 2024.

  • Specialty: Anesthesiologist (Medicare lists Anesthesiology)
  • Address: 9395 Crown Crest Blvd, Parker, CO 80138 · Directions
  • Phone: (303) 438‑3999
  • Medicare: Accepts Medicare assignment
  • Hospital: AdventHealth Parker
  • Group practice: US Anesthesia Partners of Colorado Inc
  • Medical school: University Of Nebraska College Of Medicine · graduated 2000 (26 years since medical school)
  • Gender (as listed): Female

From official Medicare data

This page shows what Medicare's official clinician data says about Sara P. Merrill, joined by NPI number (data updated October 2, 2026). It is not a recommendation or a rating. Call the office or hospital to confirm before you go.

In a medical emergency, call 911.

Quick answers

Does Sara P. Merrill accept Medicare assignment?
Yes. Medicare's clinician data says Sara P. Merrill 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 Sara P. Merrill see?
In 2024, CMS data shows 110 Original Medicare patients and 112 services for Sara P. Merrill. This counts Original Medicare only and measures volume, not quality.
What is Sara P. Merrill's NPI number?
1538141353. 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 Sara P. Merrill, 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 patients110
Services billed to Medicare112
Different services or procedures9
Participating Medicare providerYes
Average age of these patients71

Most frequent services

  1. Anesthesia for other procedure on large bowel using an endoscope (00811)88 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 pressure69%
  • Arthritis50%
  • Ischemic heart disease22%
  • Cancer (breast, colorectal, lung, prostate, endometrial or leukemia/lymphoma)20%
  • Diabetes19%

Hospitals where Sara P. Merrill works

Medicare's Facility Affiliation Data lists Sara P. Merrill 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 ParkerParker, CO · Acute Care Hospital · Medicare rating: 5 of 5 stars · Emergency services: listed by Medicare · CCN 060114

Practice locations

Addresses where Sara P. Merrill is enrolled with Medicare (CMS data updated October 2, 2026).

Group practices

Medicare enrollment lists Sara P. Merrill as a member of this group (CMS data updated October 2, 2026).

  • US Anesthesia Partners of Colorado Inc461 clinicians in the group

Specialties

Find other Anesthesiology doctors in Colorado →

Other anesthesiologists in Colorado

Clinicians with the same Medicare primary specialty in Colorado — not a recommendation.

All anesthesiologists in Colorado →

Other clinicians in US Anesthesia Partners of Colorado Inc

Medicare enrollment lists these clinicians in the same group practice — not a recommendation.

Clinician information

CredentialMD
Medical schoolUniversity Of Nebraska College Of Medicine
Graduation year2000 (26 years since medical school)
Gender (as listed)Female
Medicare assignmentAccepts (Medicare-approved amount as full payment)
NPI (National Provider Identifier)1538141353
CorrectionsReport 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

  1. Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
  2. Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
  3. National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
  4. Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
  5. NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
  6. Medicare Care Compare — official Medicare tool to look up clinicians