Nathan Russell Ayer, M.D., M.P.H.
Internal Medicine Physician · Loveland, CO
Nathan Russell Ayer, M.D., M.P.H. is an internal medicine physician with a practice address in Loveland, Colorado, and NPI 1457361172, issued on Aug 8, 2006. Check the license (Colorado DR.0054301, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Nathan Russell Ayer
- Credential
- M.D., M.P.H.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- DR.0054301 CO
042-00010678 VT
Self-reported in NPPES; status is on the state search - Practice location
- 2500 Rocky Mountain Ave, Loveland, CO 80538
- Phone
- (970) 203-7050
- Enumerated
- Aug 8, 2006
- Record last updated
- Jul 24, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (970) 203-7055
- Medicaid ID
- 83854240 CO
- Medicare enrollment
- Enrolled (PECOS I20141204000465); accepts Medicare assignment
- Medical or professional school
- University Of Rochester School Of Medicine And Dentistry, 2001
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 2500 Rocky Mountain Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Grace Alessi, MDInternal Medicine Physician1457381964
- Sarah Ashmore, MDUrogynecology and Reconstructive Pelvic Surgery (Obstetrics & Gynecology) Physician1790274280
- Jessica Bare, D.O.Obstetrics & Gynecology Physician1528357209
- Elizabeth Bauer, NPNurse Practitioner1790795151
Verify Nathan Russell Ayer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license DR.0054301Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.2 times the Medicare Part D claims of the average internal medicine physician in 2024
10,251 Medicare Part D claims for 781 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 307 claims were for opioids.
Most prescribed
- Atorvastatin Calcium682 claims
- Levothyroxine Sodium604 claims
- Rosuvastatin Calcium432 claims
- Losartan Potassium404 claims
- Lisinopril380 claims
- Amlodipine Besylate377 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- Poudre Valley Medical Group LLCFirestone, CO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathan Russell Ayer among 2,046 internal medicine physician records in Colorado
Nathan Russell Ayer, M.D., M.P.H. is one of 2,046 internal medicine physician records with a practice address in Colorado. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 60% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2001 · median 2006 among the 1,090 with a school on file
- Record last updated2015 · 61% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
28 internal medicine physician records list a practice address in Loveland
They are 28 of the 2,113 NPPES records with a practice address in Loveland, and 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Loveland → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Grace Alessi, MDLoveland, CO 805381457381964
- Sheila Copple, D.O.Loveland, CO 805381255384087
- Julia Cuervo, M.D.Loveland, CO 805381275500787
- Sarvin Emami, MDLoveland, CO 805381154304376
- Bertrand Honea, M.D.Loveland, CO 805381194742981
- Kevin Keefe, DOLoveland, CO 805381689663684
- William Lopez, M.D.Loveland, CO 805381023015807
- Joel ParlimentLoveland, CO 805381851374011
Common questions
What is Nathan Russell Ayer, M.D., M.P.H.'s NPI number?
Nathan Russell Ayer, M.D., M.P.H.'s National Provider Identifier (NPI) is 1457361172, issued on Aug 8, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Nathan Russell Ayer, M.D., M.P.H. located?
The NPPES record lists a practice address at 2500 Rocky Mountain Ave, Loveland, CO, 80538. Phone: (970) 203-7050. Providers update this record themselves, so call before visiting.
How can I verify Nathan Russell Ayer, M.D., M.P.H.'s license?
NPPES lists Colorado license number DR.0054301, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Nathan Russell Ayer, M.D., M.P.H. prescribe under Medicare Part D?
In 2024, Nathan Russell Ayer, M.D., M.P.H. had 10,251 Medicare Part D claims for 781 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.