Robert R. Fierer, M.D.
Internal Medicine Physician · Northglenn, CO
Robert R. Fierer, M.D. is an internal medicine physician with a practice address in Northglenn, Colorado, and NPI 1477550960, issued on Jun 30, 2005. Check the license (Colorado AF6214960, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Robert R. Fierer
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- AF6214960 CO
DR.0049839 CO
MD035627L PA
Self-reported in NPPES; status is on the state search - Practice location
- 10050 Ralston RD # 1 - B/E, Northglenn, CO 80233
- Phone
- (720) 401-2340
- Enumerated
- Jun 30, 2005
- Record last updated
- Feb 10, 2023
- Medicaid ID
- 9000198814 CO
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Verify Robert R. Fierer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license AF6214960Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
27 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of 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.
Industry payments in 2024: $47.35
2 payments; by number, the most common kind was food and beverage; the largest payer was Janssen Pharmaceuticals, Inc. The 50,334 providers of this specialty with any payment received $1,303.06 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Robert R. Fierer among 2,046 internal medicine physician records in Colorado
Robert R. Fierer, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileNo · 53% of these records are
- Record last updated2023 · 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).
Internal Medicine Physician providers in Colorado
There are 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Northglenn → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Michelle Murphy, DONorthglenn, CO 802331053997759
- Brian Ahlstrand, M.D.Westminster, CO 802341487920690
- James Hardee, MDWestminster, CO 802341134256720
- Gayle HutchinsonWestminster, CO 802341366572117
- John Mahoney, M.D.Westminster, CO 802341730223512
- Daniel McAninch, MDWestminster, CO 802341962539940
- Ben Mendoza, M.D.Northglenn, CO 802341285955534
- Renee Micielli, MDWestminster, CO 802341134248545
Common questions
What is Robert R. Fierer, M.D.'s NPI number?
Robert R. Fierer, M.D.'s National Provider Identifier (NPI) is 1477550960, issued on Jun 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Robert R. Fierer, M.D. located?
The NPPES record lists a practice address at 10050 Ralston RD # 1 - B/E, Northglenn, CO, 80233. Phone: (720) 401-2340. Providers update this record themselves, so call before visiting.
How can I verify Robert R. Fierer, M.D.'s license?
NPPES lists Colorado license number AF6214960, 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 Robert R. Fierer, M.D. prescribe under Medicare Part D?
In 2024, Robert R. Fierer, M.D. had 27 Medicare Part D claims; 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.