IHA HEALTH SERVICES CORPORATION
NPI 1235286840
Obstetrics & Gynecology in Ann Arbor, MI

Q: What is Iha Health Services Corporation's NPI number?

The NPI number for Iha Health Services Corporation is 1235286840. It was assigned to this organization in the NPPES registry on January 4, 2007. The provider is doing business as IHA Ann Arbor OB /Gyn.

Q: What is Iha Health Services Corporation's specialty?

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

Active since January 04, 2007

4200 WHITEHALL DR STE 300, ANN ARBOR, MI 48105(734) 434-0477(734) 434-6240 Get Directions Write a Review

NPPES record last updated: March 24, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Mar 24, 2026, Dec 19, 2018 (2 updates tracked since 2018).

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About Iha Health Services Corporation NPPES

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

IHA HEALTH SERVICES CORPORATION (NPI 1235286840), doing business as Iha Ann Arbor Ob /gyn, is a healthcare organization registered as an obstetrics & gynecology in Ann Arbor, Michigan and active in the NPI registry since January 2007. The organization lists Cynthia A Elliott, Vp/chief Operatng Officer, as its authorized official.

NPPES Registry Identity

NPI1235286840

Entity TypeOrganization

Primary Taxonomy207V00000X

Legal Business NameIHA HEALTH SERVICES CORPORATION

Location Address4200 WHITEHALL DR STE 300Ann Arbor, MI 48105-9694

Mailing Address24 Frank Lloyd Wright Dr Ste J2000Ann Arbor, MI 48105-9484 · (734) 747-6766 · Fax (734) 222-3100

Phone(734) 434-0477

Fax(734) 434-6240

Organization SubpartNo

Authorized OfficialCynthia A ElliottVp/chief Operatng Officer · (734) 747-6766

Enumeration DateJanuary 4, 2007

Last NPPES UpdateMarch 24, 20262 updates tracked since enumeration

NPPES CertifiedMarch 24, 2026

✔ NPI 1235286840 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyObstetrics & GynecologyAllopathic & Osteopathic Physicians

Taxonomy Code207V00000X

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.

4200 WHITEHALL DR STE 300, Ann Arbor, MI 48105

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Other Names 1

Doing Business AsIha Ann Arbor Ob /gyn

Group Practice 1

Group TaxonomyThis provider is a business group of one or more individual practitioners, who practice with different areas of specialization.193200000X MULTI-SPECIALTY GROUP

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Care Network of Michigan, Blue Cross Blue Shield of Michigan Mutual Insurance Company.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment and the clinicians who bill Medicare through this organization, from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Iha Health Services Corporation is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Clinicians Billing Medicare Through This Organization

1,476

Medicare enrollment records show 1,476 clinicians reassign Medicare billing to Iha Health Services Corporation, which bills Medicare for the services they deliver. Of these, 49 practice at this address and 834 within 10 miles. Listed here are the 20 practicing nearest to this location.

Clinicians by Medicare Specialty 52

Internal Medicine332

Nurse Practitioner250

Family Practice229

Obstetrics/Gynecology76

Hospitalist54

Clinical Social Worker50

Psychiatry47

Neurology36

44 other specialties402

Nearest to this location (20)

See all 1,476

Matthew Ajluni, DO

Family Practice

NPI 1124072400

4200 WHITEHALL DR STE 150
Ann Arbor, MI 48105

(734) 995-0308

✔ PECOS✔ Accepts MedicareSame address

Abbey Alsip, NP

Nurse Practitioner

NPI 1275392144

4200 WHITEHALL DR
Ann Arbor, MI 48105

(734) 434-0477

✔ PECOS✔ Accepts MedicareSame address

Colleen Bates, WHNP-BC

Nurse Practitioner

NPI 1326612425

4200 WHITEHALL DR STE 330
Ann Arbor, MI 48105

(734) 434-0477

✔ PECOS✔ Accepts MedicareSame address

Kelsey Boudjalis

Certified Nurse Midwife (CNM)

NPI 1639911597

4200 WHITEHALL DR STE 350
Ann Arbor, MI 48105

(734) 572-9600

✔ PECOSSame address

Jessica Braman, CNMW

Certified Nurse Midwife (CNM)

NPI 1770147324

4200 WHITEHALL DR STE 350
Ann Arbor, MI 48105

(734) 572-9600

✔ PECOSSame address

Yiding Cai, MD

Internal Medicine

NPI 1831536895

4200 WHITEHALL DR SUITE 130
Ann Arbor, MI 48105

(734) 995-0303

✔ PECOS✔ Accepts MedicareSame address

Elaina Dean, CNM

Certified Nurse Midwife (CNM)

NPI 1467222943

4200 WHITEHALL DR STE 350
Ann Arbor, MI 48105

(734) 572-9600

✔ PECOSSame address

Lisa Desmond, MD

Obstetrics/Gynecology

NPI 1063919298

4200 WHITEHALL DR STE 330
Ann Arbor, MI 48105

(734) 434-0477

✔ PECOS✔ Accepts MedicareSame address

Angela Jang, DO

Family Practice

NPI 1992265730

4200 WHITEHALL DR
Ann Arbor, MI 48105

(734) 995-0303

✔ PECOS✔ Accepts MedicareSame address

Daniel Masserang, NP

Nurse Practitioner

NPI 1790301109

4200 WHITEHALL DR SUITE 150
Ann Arbor, MI 48105

(734) 995-0308

✔ PECOS✔ Accepts MedicareSame address

Dana Oneill, D.O.

Family Practice

NPI 1023305216

4200 WHITEHALL DR STE 130
Ann Arbor, MI 48105

(734) 995-0303

✔ PECOS✔ Accepts MedicareSame address

Jennifer Oneill

Obstetrics/Gynecology

NPI 1437545431

4200 WHITEHALL DR STE 330
Ann Arbor, MI 48105

(734) 434-0477

✔ PECOS✔ Accepts MedicareSame address

Bernice Sessa, MD

Emergency Medicine

NPI 1851425672

4200 WHITEHALL DRIVE SUITE 150
Ann Arbor, MI 48105

(734) 995-0308

✔ PECOSSame address

Alia Shah, MD

Obstetrics/Gynecology

NPI 1609360015

4200 WHITEHALL DR STE 330
Ann Arbor, MI 48105

(734) 434-0477

✔ PECOS✔ Accepts MedicareSame address

Sherrie Tefend, M.D.

Internal Medicine

NPI 1609877109

4200 WHITEHALL DR STE 130
Ann Arbor, MI 48105

(734) 995-0303

✔ PECOS✔ Accepts MedicareSame address

Tendai Thomas, M.D.

Internal Medicine

NPI 1699776377

4200 WHITEHALL DR STE 130
Ann Arbor, MI 48105

(734) 995-0303

✔ PECOS✔ Accepts MedicareSame address

Matthew Vasievich, M.D.

Dermatology

NPI 1235576174

4200 WHITEHALL DR STE 250
Ann Arbor, MI 48105

(734) 677-3376

✔ PECOS✔ Accepts MedicareSame address

Padma Nallamothu, M.D.

Dermatology

NPI 1265510390

4200 WHITEHALL DR STE 250
Ann Arbor, MI 48105

(734) 677-3376

✔ PECOS✔ Accepts MedicareSame address

James Siskosky, DO

Preventive Medicine

NPI 1962523308

4200 WHITEHALL DR STE 150
Ann Arbor, MI 48105

(734) 995-0308

✔ PECOSSame address

Renee Nilan, M.D.

Emergency Medicine

NPI 1568576841

4200 WHITEHALL DR STE 150
Ann Arbor, MI 48105

(734) 995-0308

✔ PECOS✔ Accepts MedicareSame address

See all 1,476 clinicians

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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 Iha Health Services Corporation's NPI number?

The NPI number for Iha Health Services Corporation is 1235286840. It was assigned to this organization in the NPPES registry on January 4, 2007. The provider is doing business as IHA Ann Arbor OB /Gyn.

Where is Iha Health Services Corporation located?

Iha Health Services Corporation is located at 4200 Whitehall Dr Ste 300, Ann Arbor, MI 48105. The listed phone number is (734) 434-0477.

What is Iha Health Services Corporation's specialty?

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

Is Iha Health Services Corporation enrolled in Medicare?

Yes. Iha Health Services Corporation is registered in the Medicare PECOS enrollment system.

How many clinicians bill Medicare through Iha Health Services Corporation?

According to the CMS Revalidation Reassignment List (October 2026 release), 1,476 clinicians in 52 Medicare specialties reassign their Medicare billing to Iha Health Services Corporation. A reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for the clinician's services. The largest specialties are Internal Medicine (332), Nurse Practitioner (250) and Family Practice (229). Of these, 49 practice at this address and 834 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Iha Health Services Corporation accept?

Health plans from Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company list Iha Health Services Corporation as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Iha Health Services Corporation was last updated on March 24, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 6 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.