MICHAEL DENIS ROYSTER M.D.
NPI 1184913899
Internal Medicine in Hyannis, MA
About Michael Denis Royster M.d. NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
MICHAEL DENIS ROYSTER M.D. (NPI 1184913899) is an individual internal medicine provider in Hyannis, Massachusetts, licensed in Massachusetts (258692) and active in the NPI registry since April 2011. He is enrolled in Medicare PECOS, is affiliated with Cape Cod Hospital, and is a graduate of Other (2011).
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
Michael Denis Royster M.d. 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 Michael Royster reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.
Hyannis, MA 02601
- Reassigned Medicare billing, Massachusetts enrollment
- 678 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 2
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Cape Cod Hospital
Acute Care Hospitals · Hyannis, MAFalmouth Hospital
Acute Care Hospitals · Falmouth, MAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 02601 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 3
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.
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 Michael Royster's NPI number?
The NPI number for Michael Royster is 1184913899. It was assigned to this individual provider in the NPPES registry on April 4, 2011.
Where is Michael Royster located?
Michael Royster practices at 27 Park St, Hyannis, MA 02601. The listed phone number is (508) 862-5976.
What is Michael Royster's specialty?
The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.
Is Michael Royster enrolled in Medicare?
Yes. Michael Royster 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 Michael Royster's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Michael Royster reassigns Medicare benefits to Physicians Of Cape Cod Hospital (Hyannis, MA). 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 Michael Royster's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Michael Royster accept?
Health plans from Taro Health list Michael Royster 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 Michael Royster affiliated with any hospitals?
According to CMS data, Michael Royster is affiliated with Cape Cod Hospital and Falmouth Hospital.
When was this NPI record last updated?
The NPPES record for Michael Royster was last updated on July 26, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 2 months 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.
# Michael Denis Royster, M.D. · NPI 1184913899
Internal Medicine physician in Hyannis, Massachusetts. Individual provider, active in the CMS NPPES registry since April 4, 2011.
## Identity
- **NPI:** 1184913899 (Entity type: Individual)
- **Enumerated:** April 4, 2011
- **Primary specialty:** Internal Medicine · taxonomy 207R00000X
- **State license:** 258692 (Massachusetts)
- **Sole proprietor:** Yes
## Practice location
- **Address:** 27 PARK ST, Hyannis, MA 02601-5230
- **Phone:** (508) 862-5976
## 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:** Physicians Of Cape Cod Hospital (NPI 1679832364, Hyannis, MA), under Medicare reassignment (form CMS-855R) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2011
## Record status
- **NPPES last updated:** July 26, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1184913899) · Data from the CMS NPPES public registry.