CRAIG MICHAEL GREVEN MD
NPI 1154304863
Ophthalmology in Winston Salem, NC
About Craig Michael Greven Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CRAIG MICHAEL GREVEN MD (NPI 1154304863) is an individual ophthalmology provider in Winston Salem, North Carolina, licensed in North Carolina (28497) and active in the NPI registry since November 2005. He is enrolled in Medicare PECOS, is affiliated with North Carolina Baptist Hospital, and is a graduate of Wake Forest University School Of Medicine (1983).
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 10
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
Craig Michael Greven 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 Craig Greven reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Winston Salem, NC 27157
- Reassigned Medicare billing, North Carolina enrollment
- 3,003 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 11
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
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
North Carolina Baptist Hospital
Acute Care Hospitals · Winston-Salem, NCPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 27157 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.
WINSTON SALEM, NC 27157
WINSTON SALEM, NC 27157
WINSTON SALEM, NC 27157
WINSTON SALEM, NC 27157
WINSTON SALEM, NC 27157
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 Craig Greven's NPI number?
The NPI number for Craig Greven is 1154304863. It was assigned to this individual provider in the NPPES registry on November 28, 2005.
Where is Craig Greven located?
Craig Greven practices at Medical Center Blvd, Winston Salem, NC 27157. The listed phone number is (336) 716-2255.
What is Craig Greven's specialty?
The primary specialty registered for this NPI is Ophthalmology with taxonomy code 207W00000X.
Is Craig Greven enrolled in Medicare?
Yes. Craig Greven 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 Craig Greven's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Craig Greven reassigns Medicare benefits to Wake Forest University Health Sciences (Winston Salem, NC). 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 Craig Greven's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Craig Greven accept?
Health plans from Ambetter Health, Ambetter from Absolute Total Care, Ambetter of North Carolina, Ambetter of Tennessee and AmeriHealth Caritas Next and 7 other insurers list Craig Greven 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 Craig Greven affiliated with any hospitals?
According to CMS data, Craig Greven is affiliated with North Carolina Baptist Hospital.
When was this NPI record last updated?
The NPPES record for Craig Greven was last updated on August 20, 2010. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 16 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.
# Craig Michael Greven, MD · NPI 1154304863
Ophthalmology physician in Winston Salem, North Carolina. Individual provider, active in the CMS NPPES registry since November 28, 2005.
## Identity
- **NPI:** 1154304863 (Entity type: Individual)
- **Enumerated:** November 28, 2005
- **Primary specialty:** Ophthalmology · taxonomy 207W00000X
- **State license:** 28497 (North Carolina)
- **Sole proprietor:** No
## Practice location
- **Address:** MEDICAL CENTER BLVD, Winston Salem, NC 27157-0001
- **Phone:** (336) 716-2255 · **Fax:** (336) 716-7994
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** Wake Forest University Health Sciences (NPI 1003803032, Winston Salem, NC), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Wake Forest University School Of Medicine, class of 1983
## Record status
- **NPPES last updated:** August 20, 2010
- **Other identifiers:** Other 5599024; Medicaid 6330207 (VA); Medicare UPIN C81900; and 7 more
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Source: [NPI Profile](https://npiprofile.com/npi/1154304863) · Data from the CMS NPPES public registry.