Mercy Hospital Grayling
NPI 1427489509 · Hematology & Oncology Physician · Grayling, MI
Mercy Hospital Grayling is a Hematology & Oncology Physician organization in Grayling, MI (NPI 1427489509).
Provider details
- NPI number
- 1427489509
- Entity type
- Organization
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Stephanie Riemer, Ceo(989) 348-5461
Specialties & taxonomies
Allopathic & Osteopathic Physicians
- Nurse Practitioner363L00000X
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
12 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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
Mailing address
Other names (DBA / former)
- Doing business as
- Mercy Health Cancer Center
Registry dates
- Enumerated
- 2013-11-27
- Last updated
- 2013-11-27
Frequently asked questions
- What is Mercy Hospital Grayling's NPI number?
- Mercy Hospital Grayling's National Provider Identifier (NPI) is 1427489509, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Mercy Hospital Grayling?
- Mercy Hospital Grayling is classified in the NPPES registry as Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Mercy Hospital Grayling located?
- Mercy Hospital Grayling's practice location on file with NPPES is 1100 E Michigan Ave, Grayling, MI 49738-1312.
- What is Mercy Hospital Grayling's phone number?
- The practice phone number listed in the NPPES registry for Mercy Hospital Grayling is (989) 348-5461.
- Who is the authorized official for Mercy Hospital Grayling?
- The authorized official listed on Mercy Hospital Grayling's NPPES record is Stephanie Riemer, Ceo. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Mercy Hospital Grayling's NPI active?
- Yes — Mercy Hospital Grayling's NPI (1427489509) is active in the NPPES registry as of the last update on 2013-11-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.