Gregory Gullickson, PH D
NPI 1023120276 · Psychologist · Iowa City, IA
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Gullickson, PH D is a Psychologist provider in Iowa City, IA (NPI 1023120276).
Provider details
- NPI number
- 1023120276
- Entity type
- Individual
- Primary specialty
- PsychologistBehavioral Health & Social Service Providers
- Credential
- PH D
- Sex
- Male
- Sole proprietor
- No
- License
- 00314 (IA)
Specialties & taxonomies
Behavioral Health & Social Service Providers
Behavioral Health & Social Service Providers
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 tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
2 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
152 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Psychotherapy, 45 Minutes90834 | 130 | $87 |
| Psychiatric Diagnostic Evaluation90791 | 22 | $141 |
Typical Medicare-allowed amounts for these services range $87–$141 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Practice location
Mailing address
Additional practice locations (1)
- 7 Stuit HallIowa City, IA 52242Phone: (319) 335-2467Fax: (319) 353-2919
Registry dates
- Enumerated
- 2006-08-31
- Last updated
- 2023-11-10
- Certified
- 2023-11-10
Frequently asked questions
- What is Gregory Gullickson's NPI number?
- Gregory Gullickson's National Provider Identifier (NPI) is 1023120276, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Gullickson's specialty?
- Gregory Gullickson is listed in the NPPES registry with a primary specialty of Psychologist (Behavioral Health & Social Service Providers).
- Where is Gregory Gullickson located?
- Gregory Gullickson's practice location on file with NPPES is 200 Hawkins Dr, Iowa City, IA 52242-1009.
- What is Gregory Gullickson's phone number?
- The practice phone number listed in the NPPES registry for Gregory Gullickson is (319) 356-4200.
- Does Gregory Gullickson accept Medicare?
- Gregory Gullickson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Gullickson's NPI active?
- Yes — Gregory Gullickson's NPI (1023120276) is active in the NPPES registry as of the last update on 2023-11-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.