Gregory Gahm, M.D.
NPI 1659424299 · Geriatric Medicine (Internal Medicine) Physician · Greenwood Village, CO
Gregory Gahm, M.D. is a Geriatric Medicine (Internal Medicine) Physician provider in Greenwood Village, CO (NPI 1659424299).
Provider details
- NPI number
- 1659424299
- Entity type
- Individual
- Primary specialty
- Geriatric Medicine (Internal Medicine) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 31709 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) |
|---|---|
| Olanzapine | 25 |
| Levothyroxine Sodium | 11 |
| Quetiapine Fumarate | 11 |
| Risperidone | 11 |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-01-18
- Last updated
- 2014-04-16
Frequently asked questions
- What is Gregory Gahm's NPI number?
- Gregory Gahm's National Provider Identifier (NPI) is 1659424299, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Gahm's specialty?
- Gregory Gahm is listed in the NPPES registry with a primary specialty of Geriatric Medicine (Internal Medicine) Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Gahm located?
- Gregory Gahm's practice location on file with NPPES is 5215 Linden Ct, Greenwood Village, CO 80121-2143.
- What is Gregory Gahm's phone number?
- The practice phone number listed in the NPPES registry for Gregory Gahm is (303) 514-3460.
- Is Gregory Gahm's NPI active?
- Yes — Gregory Gahm's NPI (1659424299) is active in the NPPES registry as of the last update on 2014-04-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.