Katherine Mayer, M.D.
NPI 1275663601 · Emergency Medicine Physician · Aurora, CO
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Katherine Mayer, M.D. is a Emergency Medicine Physician provider in Aurora, CO (NPI 1275663601).
Provider details
- NPI number
- 1275663601
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- DR.0058805 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
174 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Critical Care, First 30-74 Minutes99291 | 66 | $209 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 39 | $171 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 21 | $171 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 21 | $118 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 15 | $70 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 12 | $117 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-06
- Last updated
- 2018-02-02
Frequently asked questions
- What is Katherine Mayer's NPI number?
- Katherine Mayer's National Provider Identifier (NPI) is 1275663601, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Katherine Mayer's specialty?
- Katherine Mayer is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Katherine Mayer located?
- Katherine Mayer's practice location on file with NPPES is 12605 E 16th Ave, Aurora, CO 80045-2545.
- What is Katherine Mayer's phone number?
- The practice phone number listed in the NPPES registry for Katherine Mayer is (720) 848-9111.
- Does Katherine Mayer accept Medicare?
- Katherine Mayer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Katherine Mayer's NPI active?
- Yes — Katherine Mayer's NPI (1275663601) is active in the NPPES registry as of the last update on 2018-02-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.