DR. ISA ILANA RYAN MD
NPI 1811350895
Obstetrics & Gynecology in Evanston, IL

Q: What is Isa Ryan's NPI number?

The NPI number for Isa Ryan is 1811350895. It was assigned to this individual provider in the NPPES registry on March 29, 2016. The provider is also known as Ms. Isa Ilana Wismann-Horther.

Q: What is Isa Ryan's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Q: When was this NPI record last updated?

The NPPES record for Isa Ryan was last updated on February 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since March 29, 2016PECOS EnrolledAccepts Medicare Assignment

93.08/100

CMS Quality Rating

1000 CENTRAL ST STE 620, EVANSTON, IL 60201(847) 933-1773 Get Directions Write a Review

NPPES record last updated: February 6, 2025. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Feb 6, 2025, Apr 28, 2022, Feb 18, 2022 and 3 more (6 updates tracked since 2016).

On this page

About Dr. Isa Ilana Ryan Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. ISA ILANA RYAN MD (NPI 1811350895) is an individual obstetrics & gynecology provider in Evanston, Illinois, licensed in Illinois (036152742) and active in the NPI registry since March 2016. She is enrolled in Medicare PECOS, is affiliated with Northshore University Healthsystem - Evanston Hospital, and maintains a secondary practice location in Skokie.

NPPES Registry Identity

NPI1811350895

Entity TypeIndividualFemale

Primary Taxonomy207V00000X

Provider Legal NameDR. ISA ILANA RYANCredential: MD

Location Address1000 CENTRAL ST STE 620Evanston, IL 60201-1780

Mailing Address1000 Central St Ste 620Evanston, IL 60201-1780 · (847) 218-9578

Phone(847) 933-1773

Sole ProprietorYes

Medical School CMSVanderbilt University School Of MedicineGraduated 2016

Enumeration DateMarch 29, 2016

Last NPPES UpdateFebruary 6, 20256 updates tracked since enumeration

NPPES CertifiedFebruary 6, 2025

✔ NPI 1811350895 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians

Taxonomy Code207V00000X

Licenses✔ Licensed in IL · 036152742✔ Licensed in IL · 036.152742

Definition

An obstetrician/gynecologist possesses special knowledge, skills and professional capability in the medical and surgical care of the female reproductive system and associated disorders. This physician serves as a consultant to other physicians and as a primary physician for women.

1000 CENTRAL ST STE 620, Evanston, IL 60201

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Other Names 1

Former Name (1)Ms. Isa Ilana Wismann-horther

Secondary Practice Location 1

Location 19650 Gross Point Rd Ste 1900Skokie, IL 60076-5006 · Phone (242) 251-1210 · Fax (847) 679-1505

Other Identifiers 2

Medicaid036152742IL

Other036.152742IL · Illinois State Medical License

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Isa Ilana Ryan Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID3779875489

PECOS Enrollment IDI20220617000799

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Hospital Affiliations CMS Care Compare

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Northshore University Healthsystem - Evanston Hospital

Acute Care Hospitals · Evanston, IL

5/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number140010

Location2650 Ridge AveEvanston, IL 60201 · Cook County

Emergency services Birthing friendly

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 60201 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$138.86 typical visit price

range $60.08 – $183.39

Typical copayment $34.71 (range $15.02 – $45.84)

Most-billed visit code 99204

Established Patient

$74.80 typical visit price

range $18.97 – $148.12

Typical copayment $18.70 (range $4.74 – $37.03)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

93.08/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored through an Alternative Payment Model

Quality

80.79

Promoting Interoperability

100

Improvement Activities

Other Providers at the Same Location NPPES 2

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

HOLLEY MAY

Genetic Counselor, MS

1000 CENTRAL ST STE 620
EVANSTON, IL 60201

Cook County (847) 570-1379

KRISTEN HUGHES MS

Genetic Counselor, MS

1000 CENTRAL ST STE 620
EVANSTON, IL 60201

Cook County (847) 570-1029

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Isa Ryan's NPI number?

The NPI number for Isa Ryan is 1811350895. It was assigned to this individual provider in the NPPES registry on March 29, 2016. The provider is also known as Ms. Isa Ilana Wismann-Horther.

Where is Isa Ryan located?

Isa Ryan practices at 1000 Central St Ste 620, Evanston, IL 60201. The listed phone number is (847) 933-1773.

What is Isa Ryan's specialty?

The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.

Is Isa Ryan enrolled in Medicare?

Yes. Isa Ryan is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Is Isa Ryan affiliated with any hospitals?

According to CMS data, Isa Ryan is affiliated with Northshore University Healthsystem - Evanston Hospital.

When was this NPI record last updated?

The NPPES record for Isa Ryan was last updated on February 6, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 19 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.