Gregory James Gahm, M.D.
Geriatric Medicine (Internal Medicine) Physician · Greenwood Village, CO
Gregory James Gahm, M.D. is a geriatric medicine (internal medicine) physician with a practice address in Greenwood Village, Colorado, and NPI 1659424299, issued on Jan 18, 2007. Check the license (Colorado 31709, as entered in NPPES) on the Colorado Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gregory James Gahm
- Credential
- M.D.
- Primary taxonomy
- Geriatric Medicine (Internal Medicine) Physician 207RG0300X
- License number
- 31709 CO
Self-reported in NPPES; status is on the state search - Practice location
- 5215 Linden CT, Greenwood Village, CO 80121
- Phone
- (303) 514-3460
- Enumerated
- Jan 18, 2007
- Record last updated
- Apr 16, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicaid ID
- U509294 CO
- Entity
- Type 1 · individual
8 nearest geriatric medicine (internal medicine) physician records → All 103 in Colorado → Look up another NPI →
Verify Gregory James Gahm in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 31709Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average geriatric medicine (internal medicine) physician in 2024
150 Medicare Part D claims for 40 beneficiaries, against an average of 4,246 among the 3,116 providers of this specialty who prescribed in Part D. Brand-name drugs were 17% of claims.
Most prescribed
- Olanzapine25 claims
- Levothyroxine Sodium11 claims
- Quetiapine Fumarate11 claims
- Risperidone11 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.
Gregory James Gahm among 103 geriatric medicine (internal medicine) physician records in Colorado
Gregory James Gahm, M.D. is one of 103 geriatric medicine (internal medicine) physician records with a practice address in Colorado. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 55% of them.
- NPI issued2007 · 55% of these records are older, 30% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 50% of these records are
- Record last updated2014 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RG0300X and a Colorado practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Geriatric Medicine (Internal Medicine) Physician providers in Colorado
There are 103 geriatric medicine (internal medicine) physician records in Colorado.
All 103 in Colorado → Every provider in Greenwood Village → Geriatric Medicine (Internal Medicine) Physician nationwide →
The 8 geriatric medicine (internal medicine) physician records with the nearest ZIP codes
- Jill Sohayda, MDLittleton, CO 801231275596652
- Gretchen Orosz, MDLone Tree, CO 801241609864842
- Michael Leiding, MDHighlands Ranch, CO 801291063447795
- George Melone, M.D.Highlands Ranch, CO 801291780659573
- Leah Ozdemir, D.O.Highlands Ranch, CO 801291285938399
- Megan Burke, MDParker, CO 801341265774210
- Katherine Pearce, MDParker, CO 801341588813208
- Jessica Adams, MDAurora, CO 800451790366888
Common questions
What is Gregory James Gahm, M.D.'s NPI number?
Gregory James Gahm, M.D.'s National Provider Identifier (NPI) is 1659424299, issued on Jan 18, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Gregory James Gahm, M.D. located?
The NPPES record lists a practice address at 5215 Linden CT, Greenwood Village, CO, 80121. Phone: (303) 514-3460. Providers update this record themselves, so call before visiting.
How can I verify Gregory James Gahm, M.D.'s license?
NPPES lists Colorado license number 31709, 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 Gregory James Gahm, M.D. prescribe under Medicare Part D?
In 2024, Gregory James Gahm, M.D. had 150 Medicare Part D claims for 40 beneficiaries; the average among geriatric medicine (internal medicine) physician prescribers was 4,246. 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.