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Sumner Sydeman, PH.D.
NPI 1376755843 · Clinical Psychologist · Flagstaff, AZ
Sumner Sydeman, PH.D. is a Clinical Psychologist provider in Flagstaff, AZ (NPI 1376755843).
Provider details
- NPI number
- 1376755843
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 3538 (AZ)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Profile Score
Detailed profile(89/100 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
617 N Humphreys St Ste 101
Flagstaff, AZ 86001-3063
Phone: (928) 779-3783
Fax: (928) 773-1150
Street-level locationGet directions
Mailing address
617 N Humphreys St Ste 101
Flagstaff, AZ 86001-3063
Registry dates
- Enumerated
- 2007-05-04
- Last updated
- 2008-04-28
Frequently asked questions
- What is Sumner Sydeman's NPI number?
- Sumner Sydeman's National Provider Identifier (NPI) is 1376755843, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sumner Sydeman's specialty?
- Sumner Sydeman is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Sumner Sydeman located?
- Sumner Sydeman's practice location on file with NPPES is 617 N Humphreys St Ste 101, Flagstaff, AZ 86001-3063.
- What is Sumner Sydeman's phone number?
- The practice phone number listed in the NPPES registry for Sumner Sydeman is (928) 779-3783.
- Is Sumner Sydeman's NPI active?
- Yes — Sumner Sydeman's NPI (1376755843) is active in the NPPES registry as of the last update on 2008-04-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.