John Day, M.D.
NPI 1497974182 · Public Health & General Preventive Medicine Physician · Boulder, CO
John Day, M.D. is a Public Health & General Preventive Medicine Physician provider in Boulder, CO (NPI 1497974182).
Provider details
- NPI number
- 1497974182
- Entity type
- Individual
- Primary specialty
- Public Health & General Preventive Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 24195 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-04-24
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Day's NPI number?
- John Day's National Provider Identifier (NPI) is 1497974182, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Day's specialty?
- John Day is listed in the NPPES registry with a primary specialty of Public Health & General Preventive Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Day located?
- John Day's practice location on file with NPPES is 3835 Norwood Ct, Boulder, CO 80304-1345.
- What is John Day's phone number?
- The practice phone number listed in the NPPES registry for John Day is (303) 449-0737.
- Is John Day's NPI active?
- Yes — John Day's NPI (1497974182) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.