GREGORY S JOHNSON D.O.
NPI 1043485501
Hospitalist in Massillon, OH
About Gregory S Johnson D.o. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
GREGORY S JOHNSON D.O. (NPI 1043485501) is an individual hospitalist provider in Massillon, Ohio, licensed in Ohio (34.009304) and active in the NPI registry since April 2008. He is enrolled in Medicare PECOS, is affiliated with University Hospitals Portage Medical Center, and is a graduate of Ohio University, College Of Osteopathic Medicine (2005).
NPPES Registry Identity
Specialties & Licenses
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
Gregory S Johnson D.o. 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 Reassignments
4Medicare enrollment records show Gregory Johnson reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Akron, OH 44304
- Reassigned Medicare billing, Ohio enrollment
- 259 clinicians in this Medicare group
Hudson, OH 44236
- Reassigned Medicare billing, Ohio enrollment
- 215 clinicians in this Medicare group
Cleveland, OH 44106
- Reassigned Medicare billing, Ohio enrollment
- 3,958 clinicians in this Medicare group
Ashtabula, OH 44004
- Reassigned Medicare billing, Ohio enrollment
- 272 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 4
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.
University Hospitals Portage Medical Center
Acute Care Hospitals · Ravenna, OHPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 44646 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Medicare Quality Performance CMS QPP · MIPS
Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.
Referred Medical Equipment & Supplies CMS DME claims 2
Durable medical equipment, devices and supplies this provider ordered from DME suppliers for patients, from Medicare fee-for-service claims.
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.
MASSILLON, OH 44646
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 Gregory Johnson's NPI number?
The NPI number for Gregory Johnson is 1043485501. It was assigned to this individual provider in the NPPES registry on April 25, 2008.
Where is Gregory Johnson located?
Gregory Johnson practices at 875 8th St NE, Massillon, OH 44646. The listed phone number is (330) 834-4798.
What is Gregory Johnson's specialty?
The primary specialty registered for this NPI is Hospitalist with taxonomy code 208M00000X.
Is Gregory Johnson enrolled in Medicare?
Yes. Gregory Johnson 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 organizations bill Medicare for Gregory Johnson's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Gregory Johnson reassigns Medicare benefits to 4 organizations: 4M Hospitalist Services, LLC (Akron, OH), Inpatient Medical Services, Inc. (Hudson, OH), University Hospitals Medical Group Inc (Cleveland, OH) and Apogee Medical Group Ohio Inc (Ashtabula, OH). Each 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 Gregory Johnson's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Gregory Johnson accept?
Health plans from CareSource list Gregory Johnson 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 Gregory Johnson affiliated with any hospitals?
According to CMS data, Gregory Johnson is affiliated with University Hospitals Portage Medical Center.
When was this NPI record last updated?
The NPPES record for Gregory Johnson was last updated on February 9, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 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.
# Gregory S Johnson, D.O. · NPI 1043485501
Hospitalist physician in Massillon, Ohio. Individual provider, active in the CMS NPPES registry since April 25, 2008.
## Identity
- **NPI:** 1043485501 (Entity type: Individual)
- **Enumerated:** April 25, 2008
- **Primary specialty:** Hospitalist · taxonomy 208M00000X
- **State license:** 34.009304 (Ohio)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 875 8TH ST NE, Massillon, OH 44646-8503
- **Phone:** (330) 834-4798
## 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:** 4 organizations under Medicare reassignment (form CMS-855R): 4M Hospitalist Services, LLC (NPI 1508288531, Akron, OH); Inpatient Medical Services, Inc. (NPI 1093756314, Hudson, OH); University Hospitals Medical Group Inc (NPI 1669499414, Cleveland, OH); Apogee Medical Group Ohio Inc (NPI 1477500999, Ashtabula, OH) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Ohio University, College Of Osteopathic Medicine, class of 2005
## Record status
- **NPPES last updated:** February 9, 2018
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Source: [NPI Profile](https://npiprofile.com/npi/1043485501) · Data from the CMS NPPES public registry.