Gregory Grossman, DDS
NPI 1003890617 · General Practice Dentistry · Denver, CO
Enrolled with Medicare as Order and Referring Only - Dentist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Grossman, DDS is a General Practice Dentistry provider in Denver, CO (NPI 1003890617).
Provider details
- NPI number
- 1003890617
- Entity type
- Individual
- Primary specialty
- General Practice DentistryDental Providers
- Credential
- DDS
- Sex
- Male
- Sole proprietor
- No
- License
- 105450 (CO)
Specialties & taxonomies
Dental Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-06
- Last updated
- 2019-11-11
Frequently asked questions
- What is Gregory Grossman's NPI number?
- Gregory Grossman's National Provider Identifier (NPI) is 1003890617, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Grossman's specialty?
- Gregory Grossman is listed in the NPPES registry with a primary specialty of General Practice Dentistry (Dental Providers).
- Where is Gregory Grossman located?
- Gregory Grossman's practice location on file with NPPES is 2130 Stout St, Denver, CO 80205-2827.
- What is Gregory Grossman's phone number?
- The practice phone number listed in the NPPES registry for Gregory Grossman is (303) 293-2220.
- Does Gregory Grossman accept Medicare?
- Gregory Grossman is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Grossman's NPI active?
- Yes — Gregory Grossman's NPI (1003890617) is active in the NPPES registry as of the last update on 2019-11-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.