What is Ryan Cullen's NPI number?

Ryan Cullen's National Provider Identifier (NPI) is 1538782636, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Ryan Cullen's specialty?

Ryan Cullen is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).

Where is Ryan Cullen located?

Ryan Cullen's practice location on file with NPPES is 1000 Central St Ste 800, Evanston, IL 60201-1780.

What is Ryan Cullen's phone number?

The practice phone number listed in the NPPES registry for Ryan Cullen is (847) 570-2512.

Does Ryan Cullen accept Medicare?

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

Is Ryan Cullen's NPI active?

Yes — Ryan Cullen's NPI (1538782636) is active in the NPPES registry as of the last update on 2025-05-15.

IndividualActiveAccepts Medicare

Ryan Cullen, MD

NPI 1538782636 · Nephrology Physician · Evanston, IL

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

Ryan Cullen, MD is a Nephrology Physician provider in Evanston, IL (NPI 1538782636).

Provider details

NPI number: 1538782636
Entity type: Individual
Primary specialty: Nephrology PhysicianAllopathic & Osteopathic Physicians
Credential: MD
Sex: Male
Sole proprietor: No

Specialties & taxonomies

Nephrology PhysicianPrimary207RN0300XLicense 036174068 (IL)
Allopathic & Osteopathic Physicians
Student in an Organized Health Care Education/Training Program390200000X
Student, Health Care
Student in an Organized Health Care Education/Training Program390200000XLicense 11023195A (IN)
Student, Health Care

Profile Score

Established profile(67/100 index)

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

Registry tenure38% of score
6 yrs in NPPES registry
Profile completeness38% of score
83% of core fields populated
Practice footprint23% of score
3 documented practice locations

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

1000 Central St Ste 800

Evanston, IL 60201-1780

Phone: (847) 570-2512

Fax: (847) 570-1696

Street-level locationGet directions

More IL providers

Mailing address

2650 Ridge Ave Ste 1223

Evanston, IL 60201-1700

Additional practice locations (2)

1131 N Keystone Ave
Indianapolis, IN 46201-1367
Phone: (763) 354-8895
950 W Walnut St
Indianapolis, IN 46202-5188
Phone: (317) 278-6061

Enumerated: 2020-05-22
Last updated: 2025-05-15
Certified: 2025-05-15

Frequently asked questions

What is Ryan Cullen's NPI number?: Ryan Cullen's National Provider Identifier (NPI) is 1538782636, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Ryan Cullen's specialty?: Ryan Cullen is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
Where is Ryan Cullen located?: Ryan Cullen's practice location on file with NPPES is 1000 Central St Ste 800, Evanston, IL 60201-1780.
What is Ryan Cullen's phone number?: The practice phone number listed in the NPPES registry for Ryan Cullen is (847) 570-2512.
Does Ryan Cullen accept Medicare?: Ryan Cullen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Ryan Cullen's NPI active?: Yes — Ryan Cullen's NPI (1538782636) is active in the NPPES registry as of the last update on 2025-05-15.

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