IHA HEALTH SERVICE CORPORATION
NPI 1922454214
Internal Medicine in Ann Arbor, MI

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

The NPI number for Iha Health Service Corporation is 1922454214. It was assigned to this organization in the NPPES registry on May 5, 2016. The provider is doing business as IHA Medicine Float Providers.

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

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Active since May 05, 2016

4200 WHITEHALL DRIVE, SUITE 130, ANN ARBOR, MI 48105(734) 995-0303(734) 995-0425 Get Directions Write a Review

NPPES record last updated: March 10, 2026. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Mar 10, 2026, Mar 3, 2026, Apr 9, 2025 and 3 more (6 updates tracked since 2022).

On this page

About Iha Health Service Corporation NPPES

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

IHA HEALTH SERVICE CORPORATION (NPI 1922454214), doing business as Iha Medicine Float Providers, is a healthcare organization registered as an internal medicine in Ann Arbor, Michigan and active in the NPI registry since May 2016. The organization maintains 30 additional practice locations and lists Cynthia Elliott, Chief Operating Officer / Evp, as its authorized official.

NPPES Registry Identity

NPI1922454214

Entity TypeOrganization

Primary Taxonomy207R00000X

Legal Business NameIHA HEALTH SERVICE CORPORATION

Location Address4200 WHITEHALL DRIVE, SUITE 130Ann Arbor, MI 48105

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

Phone(734) 995-0303

Fax(734) 995-0425

Organization SubpartNo

Authorized OfficialCynthia ElliottChief Operating Officer / Evp · (734) 747-6766

Enumeration DateMay 5, 2016

Last NPPES UpdateMarch 10, 20266 updates tracked since enumeration

NPPES CertifiedMarch 10, 2026

✔ NPI 1922454214 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 4

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians

Taxonomy Code207R00000X

Definition

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Also ListedFamily MedicineTaxonomy 207Q00000X

Also ListedPhysician AssistantTaxonomy 363A00000X

Also ListedNurse PractitionerTaxonomy 363L00000X

4200 WHITEHALL DRIVE, Ann Arbor, MI 48105

Open in Google Maps ↗

Other Names 1

Doing Business AsIha Medicine Float Providers

Secondary Practice Locations 30

Location 110020 Professional Centre Drive, Suite 120Hamburg, MI 48139 · Phone (810) 231-0252 · Fax (810) 231-0256

Location 228300 Orchard Lake Rd Ste 103Farmington Hills, MI 48334-3704 · Phone (248) 287-7860

Location 34350 Jackson Rd Ste 200Ann Arbor, MI 48103-1889 · Phone (734) 761-2581 · Fax (734) 761-9540

Location 45505 S Old US 23 Ste 100Brighton, MI 48116-7524 · Phone (810) 494-6885 · Fax (810) 494-6839

Location 52305 Genoa Business Park Dr Ste 200Brighton, MI 48114-7005 · Phone (810) 494-6840 · Fax (810) 494-6841

Location 6202 W Highland RdHowell, MI 48843-1162 · Phone (517) 234-6540 · Fax (517) 338-9083

Location 7870 E Arkona Rd Ste 100Milan, MI 48160-9770 · Phone (734) 439-2429 · Fax (734) 439-0200

Location 8990 W Ann Arbor Trl Ste 208Plymouth, MI 48170-1297 · Phone (734) 455-1200 · Fax (734) 455-5219

Location 911775 Tecumseh Clinton RdClinton, MI 49236-9541 · Phone (517) 456-7449 · Fax (517) 456-6059

Location 10212 S Main St Ste ABrooklyn, MI 49230-9114 · Phone (517) 592-8033 · Fax (517) 592-3959

Location 115789 S Main St Ste 100Clarkston, MI 48346-2959 · Phone (248) 625-0030

Location 1220206 Farmington RdLivonia, MI 48152-1412 · Phone (248) 476-4724

Location 1329370 Plymouth Rd Ste 100Livonia, MI 48150-2399 · Phone (734) 655-8200

Location 1419000 St Joes Pkwy Ste 200Livonia, MI 48152-1477 · Phone (734) 213-3685

Location 1543097 Woodward Ave Ste 100Bloomfield Township, MI 48302-5042 · Phone (248) 836-0040

Location 1614288 E Old US Highway 12 Ste 200Chelsea, MI 48118-2700 · Phone (734) 475-8677 · Fax (734) 327-0826

Location 173477 E Grand River AveHowell, MI 48843-8552 · Phone (517) 338-9090

Location 1823200 Pontiac TrlSouth Lyon, MI 48178-1983 · Phone (248) 446-2935 · Fax (248) 446-2936

Location 191854 W Auburn Rd Ste 300ARochester Hills, MI 48309-3868 · Phone (248) 618-6000

Location 204123 Martin Rd Ste 102Commerce Township, MI 48390-4151 · Phone (248) 366-3700

Location 211375 S Lapeer Rd Ste 210Lake Orion, MI 48360-1421 · Phone (248) 693-5700

Location 224400 Highland RdWaterford, MI 48328-1222 · Phone (248) 618-6000

Location 234940 W Clark Rd Ste 100Ypsilanti, MI 48197-0860 · Phone (734) 971-1188 ext. 73497

Location 2449650 Cherry Hill Rd Ste 120Canton, MI 48187-4850 · Phone (734) 398-7800 · Fax (734) 398-7805

Location 2510200 Dexter Pinckney Rd Ste 100Pinckney, MI 48169-8928 · Phone (734) 878-1000 · Fax (734) 878-1001

Location 265361 McAuley DrYpsilanti, MI 48197-1011 · Phone (734) 712-1300 · Fax (734) 222-3665

Location 271065 N Huron River Dr Ste 100Ypsilanti, MI 48197-3296 · Phone (734) 896-4110 · Fax (734) 896-4111

Location 287115 E Michigan Ave Ste 100Saline, MI 48176-2700 · Phone (734) 977-0013 · Fax (734) 977-0169

Location 297093 Dexter Ann Arbor RdDexter, MI 48130-8568 · Phone (734) 426-9028 · Fax (734) 429-9029

Location 301600 S Canton Center Rd Ste 200Canton, MI 48188-6276 · Phone (734) 398-7880 · Fax (734) 761-7318

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 Service 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 Service Corporation, which bills Medicare for the services they deliver. Of these, 49 practice at this address and 832 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 Service Corporation's NPI number?

The NPI number for Iha Health Service Corporation is 1922454214. It was assigned to this organization in the NPPES registry on May 5, 2016. The provider is doing business as IHA Medicine Float Providers.

Where is Iha Health Service Corporation located?

Iha Health Service Corporation is located at 4200 Whitehall Drive Suite 130, Ann Arbor, MI 48105. The listed phone number is (734) 995-0303.

What is Iha Health Service Corporation's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is Iha Health Service Corporation enrolled in Medicare?

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

How many clinicians bill Medicare through Iha Health Service 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 Service 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 832 within 10 miles. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

What insurance does Iha Health Service Corporation accept?

Health plans from Blue Care Network of Michigan and Blue Cross Blue Shield of Michigan Mutual Insurance Company list Iha Health Service 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 Service Corporation was last updated on March 10, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.