Gregory Harms, PSY.D., LCP
NPI 1538579354 · Clinical Psychologist · Chicago, IL
Enrolled with Medicare as Practitioner - Clinical Psychologist · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Harms, PSY.D., LCP is a Clinical Psychologist provider in Chicago, IL (NPI 1538579354).
Provider details
- NPI number
- 1538579354
- Entity type
- Individual
- Primary specialty
- Clinical PsychologistBehavioral Health & Social Service Providers
- Credential
- PSY.D., LCP
- Sex
- Male
- Sole proprietor
- Yes
- License
- 180.008990 (IL)
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
12 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
341 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) |
|---|---|---|
| Treatment of Behavior Impacting Health, Initial 30 Minutes96158 | 124 | $55 |
| Psychotherapy, 30 Minutes90832 | 117 | $65 |
| Psychiatric Diagnostic Evaluation90791 | 42 | $144 |
| Psychotherapy, 45 Minutes90834 | 29 | $64 |
| Assessment of Health Behavior96156 | 29 | $84 |
Typical Medicare-allowed amounts for these services range $55–$144 (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 (2)
- 2900 N Lake Shore Dr Fl 9Chicago, IL 60657-5640Phone: (773) 665-4836Fax: (773) 665-3649
- 1460 N Halsted St Ste 501Chicago, IL 60642-2615Phone: (773) 388-6390Fax: (312) 867-7101
Registry dates
- Enumerated
- 2014-05-01
- Last updated
- 2019-01-31
Frequently asked questions
- What is Gregory Harms's NPI number?
- Gregory Harms's National Provider Identifier (NPI) is 1538579354, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Harms's specialty?
- Gregory Harms is listed in the NPPES registry with a primary specialty of Clinical Psychologist (Behavioral Health & Social Service Providers).
- Where is Gregory Harms located?
- Gregory Harms's practice location on file with NPPES is 655 W Irving Park Rd, Chicago, IL 60613-3123.
- What is Gregory Harms's phone number?
- The practice phone number listed in the NPPES registry for Gregory Harms is (773) 528-1777.
- Does Gregory Harms accept Medicare?
- Gregory Harms is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Harms's NPI active?
- Yes — Gregory Harms's NPI (1538579354) is active in the NPPES registry as of the last update on 2019-01-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.