Joel Merkwan, PH.D.
NPI 1699810879 · Clinical Psychologist · Yankton, SD
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joel Merkwan, PH.D. is a Clinical Psychologist provider in Yankton, SD (NPI 1699810879).
Provider details
- NPI number
- 1699810879
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 393 (ND)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
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
- 2007-02-21
- Last updated
- 2010-06-29
Frequently asked questions
- What is Joel Merkwan's NPI number?
- Joel Merkwan's National Provider Identifier (NPI) is 1699810879, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joel Merkwan's specialty?
- Joel Merkwan is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Joel Merkwan located?
- Joel Merkwan's practice location on file with NPPES is 327 Broadway Ave Ste 15, Yankton, SD 57078-7800.
- What is Joel Merkwan's phone number?
- The practice phone number listed in the NPPES registry for Joel Merkwan is (605) 661-6128.
- Does Joel Merkwan accept Medicare?
- Joel Merkwan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joel Merkwan's NPI active?
- Yes — Joel Merkwan's NPI (1699810879) is active in the NPPES registry as of the last update on 2010-06-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.