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Douglas Mccallum, M.D.
NPI 1801893110 · Internal Medicine Physician · Denver, CO
Douglas Mccallum, M.D. is a Internal Medicine Physician provider in Denver, CO (NPI 1801893110).
Provider details
- NPI number
- 1801893110
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 21565 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
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
425 S Cherry St
Suite 510
Denver, CO 80246-1226
Phone: (303) 388-4076
Fax: (303) 320-0439
Street-level locationGet directions
Mailing address
1707 Cole Blvd
Golden, CO 80401-3220
Registry dates
- Enumerated
- 2005-06-30
- Last updated
- 2013-10-04
Frequently asked questions
- What is Douglas Mccallum's NPI number?
- Douglas Mccallum's National Provider Identifier (NPI) is 1801893110, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Douglas Mccallum's specialty?
- Douglas Mccallum is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Douglas Mccallum located?
- Douglas Mccallum's practice location on file with NPPES is 425 S Cherry St, Denver, CO 80246-1226.
- What is Douglas Mccallum's phone number?
- The practice phone number listed in the NPPES registry for Douglas Mccallum is (303) 388-4076.
- Is Douglas Mccallum's NPI active?
- Yes — Douglas Mccallum's NPI (1801893110) is active in the NPPES registry as of the last update on 2013-10-04.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.