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Harold Ziesat, PH.D.
NPI 1811101769 · Clinical Psychologist · Columbia, MD
Harold Ziesat, PH.D. is a Clinical Psychologist provider in Columbia, MD (NPI 1811101769).
Provider details
- NPI number
- 1811101769
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PH.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 02101 (MD)
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
8640 Guilford Rd Ste 252
Columbia, MD 21046
Phone: (410) 997-1183
Fax: (410) 997-1183
Street-level locationGet directions
Mailing address
8640 Guilford Rd Ste 252
Columbia, MD 21046-2666
Registry dates
- Enumerated
- 2007-05-10
- Last updated
- 2018-08-10
Frequently asked questions
- What is Harold Ziesat's NPI number?
- Harold Ziesat's National Provider Identifier (NPI) is 1811101769, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harold Ziesat's specialty?
- Harold Ziesat is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Harold Ziesat located?
- Harold Ziesat's practice location on file with NPPES is 8640 Guilford Rd Ste 252, Columbia, MD 21046.
- What is Harold Ziesat's phone number?
- The practice phone number listed in the NPPES registry for Harold Ziesat is (410) 997-1183.
- Is Harold Ziesat's NPI active?
- Yes — Harold Ziesat's NPI (1811101769) is active in the NPPES registry as of the last update on 2018-08-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.