DR. CRISTINA GREULICH MD
NPI 1144559378
Hospitalist in Royal Oak, MI
About Dr. Cristina Greulich Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CRISTINA GREULICH MD (NPI 1144559378) is an individual hospitalist provider in Royal Oak, Michigan, licensed in Michigan (4301095804) and active in the NPI registry since December 2009. She is enrolled in Medicare PECOS, is affiliated with Beaumont Hospital Royal Oak, and is a graduate of Other (1995).
NPPES Registry Identity
Specialties & Licenses 2
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Cristina Greulich 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.
Medicare Billing Reassignment
Medicare enrollment records show Cristina Greulich reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Royal Oak, MI 48073
- Reassigned Medicare billing, Michigan enrollment
- Medicare enrollment name: Hospital Consultants PC
- 58 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 7
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Beaumont Hospital Royal Oak
Acute Care Hospitals · Royal Oak, MIBeaumont Hospital - Farmington Hills
Acute Care Hospitals · Farmington Hills, MIBeaumont Hospital, Troy
Acute Care Hospitals · Troy, MIPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 48073 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
ROYAL OAK, MI 48073
ROYAL OAK, MI 48073
ROYAL OAK, MI 48073
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 Cristina Greulich's NPI number?
The NPI number for Cristina Greulich is 1144559378. It was assigned to this individual provider in the NPPES registry on December 17, 2009.
Where is Cristina Greulich located?
Cristina Greulich practices at 3601 W 13 Mile Rd, Royal Oak, MI 48073. The listed phone number is (248) 691-8646.
What is Cristina Greulich's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Cristina Greulich enrolled in Medicare?
Yes. Cristina Greulich 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.
Which organization bills Medicare for Cristina Greulich's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Cristina Greulich reassigns Medicare benefits to Hospital Consultants, P.C. (Royal Oak, MI). The 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 Cristina Greulich's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Cristina Greulich accept?
Health plans from Ambetter Health, Ambetter from Buckeye Health Plan, Ambetter from Meridian and Priority Health list Cristina Greulich 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.
Is Cristina Greulich affiliated with any hospitals?
According to CMS data, Cristina Greulich is affiliated with Beaumont Hospital Royal Oak, Beaumont Hospital - Farmington Hills and Beaumont Hospital, Troy.
When was this NPI record last updated?
The NPPES record for Cristina Greulich was last updated on April 7, 2017. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 9 years 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.
# Dr. Cristina Greulich, MD · NPI 1144559378
Hospitalist physician in Royal Oak, Michigan. Individual provider, active in the CMS NPPES registry since December 17, 2009.
## Identity
- **NPI:** 1144559378 (Entity type: Individual)
- **Enumerated:** December 17, 2009
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 4301095804 (Michigan)
- **Sole proprietor:** No
## Practice location
- **Address:** 3601 W 13 MILE RD, Royal Oak, MI 48073-6712
- **Phone:** (248) 691-8646
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health
- **Bills Medicare through:** Hospital Consultants, P.C. (NPI 1073543013, Royal Oak, MI), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 1995
## Record status
- **NPPES last updated:** April 7, 2017
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Source: [NPI Profile](https://npiprofile.com/npi/1144559378) · Data from the CMS NPPES public registry.