Nathan Giffen Rockey, MD
Internal Medicine Physician · Westminster, CO
Nathan Giffen Rockey, MD is an internal medicine physician with a practice address in Westminster, Colorado, and NPI 1740868512, issued on Mar 31, 2021. Check the license (Colorado DR.0075969, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Nathan Giffen Rockey
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License numbers
- DR.0075969 CO
329465 NY
Self-reported in NPPES; status is on the state search - Practice location
- 7701 Sheridan Blvd, Westminster, CO 80003
- Phone
- (303) 338-4545
- Enumerated
- Mar 31, 2021
- Record last updated
- Sep 10, 2025
- Medicaid ID
- 9000194306 CO
- Medicare enrollment
- Enrolled (PECOS I20240618000324); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,046 in Colorado → Look up another NPI →
Also registered at 7701 Sheridan Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Nathan Giffen Rockey in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license DR.0075969Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
86% fewer Medicare Part D claims than the average internal medicine physician in 2024
431 Medicare Part D claims for 110 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.
Most prescribed
- Atorvastatin Calcium31 claims
- Rosuvastatin Calcium25 claims
- Amlodipine Besylate17 claims
- Jardiance16 claims
- Fluticasone Propionate15 claims
- Albuterol Sulfate Hfa11 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 2 group practices
- Colorado Permanente Medical Group PCWestminster, CO
- New York City Health And Hospitals CorporationNew York, NY
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Nathan Giffen Rockey among 2,046 internal medicine physician records in Colorado
Nathan Giffen Rockey, MD 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 2021, is newer than 94% of them.
- NPI issued2021 · 94% of these records are older, 3% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2021 · median 2006 among the 1,090 with a school on file
- Record last updated2025 · 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).
42 internal medicine physician records list a practice address in Westminster
They are 42 of the 2,492 NPPES records with a practice address in Westminster, and 2,046 internal medicine physician records in Colorado.
All 2,046 in Colorado → Every provider in Westminster → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Rebecca Agnew, M.D.Westminster, CO 800031093845836
- Christine Bellantoni, MDWestminster, CO 800031477507796
- Terrence Boland, MDWestminster, CO 800031851428817
- Lori BrooksWestminster, CO 800031215067079
- Cynthia IrelandArvada, CO 800031851435572
- Kelly Jeong, MDArvada, CO 800031487781431
- Matha JohnsonWestminster, CO 800031487798013
- Joel Jorgenson, M.D.Westminster, CO 800031457627267
Common questions
What is Nathan Giffen Rockey, MD's NPI number?
Nathan Giffen Rockey, MD's National Provider Identifier (NPI) is 1740868512, issued on Mar 31, 2021. An NPI identifies a provider in billing; it is not a license.
Where is Nathan Giffen Rockey, MD located?
The NPPES record lists a practice address at 7701 Sheridan Blvd, Westminster, CO, 80003. Phone: (303) 338-4545. Providers update this record themselves, so call before visiting.
How can I verify Nathan Giffen Rockey, MD's license?
NPPES lists Colorado license number DR.0075969, 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 Giffen Rockey, MD prescribe under Medicare Part D?
In 2024, Nathan Giffen Rockey, MD had 431 Medicare Part D claims for 110 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.