IndividualActive
John Zager, PH.D.
NPI 1366500894 · Psychologist · College Park, MD
John Zager, PH.D. is a Psychologist provider in College Park, MD (NPI 1366500894).
Provider details
- NPI number
- 1366500894
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 02029 (MD)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(90/100 index)
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
4700 Berwyn House Rd
Suite 105
College Park, MD 20740-2474
Phone: (301) 537-7284
Fax: (301) 474-0432
Street-level locationGet directions
Mailing address
9029 49th Pl
College Park, MD 20740-1834
Registry dates
- Enumerated
- 2006-12-05
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Zager's NPI number?
- John Zager's National Provider Identifier (NPI) is 1366500894, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Zager's specialty?
- John Zager is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is John Zager located?
- John Zager's practice location on file with NPPES is 4700 Berwyn House Rd, College Park, MD 20740-2474.
- What is John Zager's phone number?
- The practice phone number listed in the NPPES registry for John Zager is (301) 537-7284.
- Is John Zager's NPI active?
- Yes — John Zager's NPI (1366500894) 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.