Active NPI
Kristin Demorest Hayes, MD
- Obstetrics & Gynecology Physician
- Ann Arbor, MI
National Provider Identifier
1245599307
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Obstetrics & Gynecology Physician
- License
- 4301100335
- Practice address
- 1500 E Medical Center Dr
Ann Arbor, MI 48109-5000 - Phone
- (734) 936-9434
- Fax
- (734) 232-6020
- NPI assigned
- May 10, 2012
- Sex
- Female
- Sole proprietor
- No
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Obstetrics & Gynecology Physician | 207V00000X | 4301100335 | MI | Primary |
Addresses
Primary practice location
1500 E Medical Center Dr
Ann Arbor, MI 48109-5000
Mailing address
1500 E Medical Center Dr
Ann Arbor, MI 48109-5000
Phone (734) 936-9434
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Enrolled
- Credentials
- Doctor of Medicine
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| 4301100335 | MI | MD | Obstetrics & Gynecology Physician |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1336608000000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1788652800000",
"number": "1245599307",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1500 E MEDICAL CENTER DR",
"city": "ANN ARBOR",
"state": "MI",
"postal_code": "481095000",
"telephone_number": "734-936-9434",
"fax_number": "734-232-6020"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1500 E MEDICAL CENTER DR",
"city": "ANN ARBOR",
"state": "MI",
"postal_code": "481095000",
"telephone_number": "734-936-9434",
"fax_number": "734-232-6020"
}
],
"practiceLocations": [],
"basic": {
"last_name": "HAYES",
"first_name": "KRISTIN",
"middle_name": "DEMOREST",
"credential": "MD",
"sole_proprietor": "NO",
"sex": "F",
"enumeration_date": "2012-05-10",
"last_updated": "2026-09-06",
"status": "A"
},
"taxonomies": [
{
"code": "207V00000X",
"taxonomy_group": "",
"desc": "Obstetrics & Gynecology",
"state": "MI",
"license": "4301100335",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Ann Arbor, MI
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 6, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.