What is Grant Hahn's NPI number?

Grant Hahn's National Provider Identifier (NPI) is 1013250885, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Grant Hahn's specialty?

Grant Hahn is listed in the NPPES registry with a primary specialty of Pediatric Critical Care Medicine Physician (Allopathic & Osteopathic Physicians).

Where is Grant Hahn located?

Grant Hahn's practice location on file with NPPES is 225 E Chicago Ave, Chicago, IL 60611-2991.

What is Grant Hahn's phone number?

The practice phone number listed in the NPPES registry for Grant Hahn is (618) 638-2964.

Does Grant Hahn accept Medicare?

Grant Hahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Grant Hahn's NPI active?

Yes — Grant Hahn's NPI (1013250885) is active in the NPPES registry as of the last update on 2024-05-01.

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Grant Hahn, M.D.

NPI 1013250885 · Pediatric Critical Care Medicine Physician · Chicago, IL

Grant Hahn, M.D. is a Pediatric Critical Care Medicine Physician provider in Chicago, IL (NPI 1013250885).

Provider details

NPI number: 1013250885
Entity type: Individual
Primary specialty: Pediatric Critical Care Medicine PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Male
Sole proprietor: Yes

Practice location

225 E Chicago Ave

Chicago, IL 60611-2991

Phone: (618) 638-2964

Street-level locationGet directions

More IL providers

Mailing address

2119 W School St

Chicago, IL 60618-6311

Specialties & taxonomies

Pediatric Critical Care Medicine PhysicianPrimary2080P0203XLicense 036.140711 (IL)
Allopathic & Osteopathic Physicians
Student in an Organized Health Care Education/Training Program390200000X
Student, Health Care

Enrolled with Medicare as Practitioner - Pulmonary Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)

Profile Score

Established profile(72/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
13 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.

Enumerated: 2013-03-31
Last updated: 2024-05-01
Certified: 2024-05-01

Frequently asked questions

What is Grant Hahn's NPI number?: Grant Hahn's National Provider Identifier (NPI) is 1013250885, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Grant Hahn's specialty?: Grant Hahn is listed in the NPPES registry with a primary specialty of Pediatric Critical Care Medicine Physician (Allopathic & Osteopathic Physicians).
Where is Grant Hahn located?: Grant Hahn's practice location on file with NPPES is 225 E Chicago Ave, Chicago, IL 60611-2991.
What is Grant Hahn's phone number?: The practice phone number listed in the NPPES registry for Grant Hahn is (618) 638-2964.
Does Grant Hahn accept Medicare?: Grant Hahn is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Grant Hahn's NPI active?: Yes — Grant Hahn's NPI (1013250885) is active in the NPPES registry as of the last update on 2024-05-01.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

Frequently asked questions