John Sadler, MD
NPI 1407909807 · Psychiatry Physician · Denver, CO
John Sadler, MD is a Psychiatry Physician provider in Denver, CO (NPI 1407909807).
Provider details
- NPI number
- 1407909807
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 15047 (CO)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
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
- 2007-01-19
- Last updated
- 2016-02-22
Frequently asked questions
- What is John Sadler's NPI number?
- John Sadler's National Provider Identifier (NPI) is 1407909807, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Sadler's specialty?
- John Sadler is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is John Sadler located?
- John Sadler's practice location on file with NPPES is 4455 E 12th Ave, Denver, CO 80220-2415.
- What is John Sadler's phone number?
- The practice phone number listed in the NPPES registry for John Sadler is (303) 504-7700.
- Is John Sadler's NPI active?
- Yes — John Sadler's NPI (1407909807) is active in the NPPES registry as of the last update on 2016-02-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.