Nathan Ayer, M.D., M.P.H.
NPI 1457361172 · Internal Medicine Physician · Loveland, CO
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Nathan Ayer, M.D., M.P.H. is a Internal Medicine Physician provider in Loveland, CO (NPI 1457361172).
Provider details
- NPI number
- 1457361172
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., M.P.H.
- Sex
- Male
- Sole proprietor
- No
- License
- 042-00010678 (VT)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
1,754 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 684 | $75 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 361 | $49 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 291 | $75 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 138 | $95 |
| Admn Sarscov2 Vacc 1 Dose90480 | 109 | $43 |
| Administration of Influenza Virus VaccineG0008 | 98 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 128 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 682 | 180 |
| Levothyroxine Sodium | 604 | 127 |
| Rosuvastatin Calcium | 432 | 116 |
| Losartan Potassium | 404 | 112 |
| Lisinopril | 380 | 104 |
| Amlodipine Besylate | 377 | 106 |
| Omeprazole |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-08
- Last updated
- 2015-07-24
Frequently asked questions
- What is Nathan Ayer's NPI number?
- Nathan Ayer's National Provider Identifier (NPI) is 1457361172, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Nathan Ayer's specialty?
- Nathan Ayer is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Nathan Ayer located?
- Nathan Ayer's practice location on file with NPPES is 2500 Rocky Mountain Ave, Loveland, CO 80538-9004.
- What is Nathan Ayer's phone number?
- The practice phone number listed in the NPPES registry for Nathan Ayer is (970) 203-7050.
- Does Nathan Ayer accept Medicare?
- Nathan Ayer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Nathan Ayer's NPI active?
- Yes — Nathan Ayer's NPI (1457361172) is active in the NPPES registry as of the last update on 2015-07-24.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.