John Gillilan, M.D.
NPI 1437104981 · Psychiatry Physician · Chicago, IL
John Gillilan, M.D. is a Psychiatry Physician provider in Chicago, IL (NPI 1437104981).
Provider details
- NPI number
- 1437104981
- Entity type
- Individual
- Primary specialty
- Psychiatry PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
83% 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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Alprazolam | 69 | 17 |
| Lorazepam | 51 | 12 |
| Fluoxetine Hcl | 38 | 12 |
| Trazodone Hcl | 37 | — |
| Sertraline Hcl | 29 | — |
| Duloxetine Hcl | 25 | — |
| Bupropion Hclbrand: Bupropion Xl |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-05-23
- Last updated
- 2007-07-08
Frequently asked questions
- What is John Gillilan's NPI number?
- John Gillilan's National Provider Identifier (NPI) is 1437104981, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Gillilan's specialty?
- John Gillilan is listed in the NPPES registry with a primary specialty of Psychiatry Physician (Allopathic & Osteopathic Physicians).
- Where is John Gillilan located?
- John Gillilan's practice location on file with NPPES is 737 N Michigan Ave, Chicago, IL 60611-2615.
- What is John Gillilan's phone number?
- The practice phone number listed in the NPPES registry for John Gillilan is (312) 255-0140.
- Is John Gillilan's NPI active?
- Yes — John Gillilan's NPI (1437104981) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.