CARL RICHARD WILLIAMS MD
NPI 1639121908
Emergency Medicine in Hyannis, MA
About Carl Richard Williams Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
CARL RICHARD WILLIAMS MD (NPI 1639121908) is an individual emergency medicine provider in Hyannis, Massachusetts, licensed in Massachusetts (48576) and active in the NPI registry since May 2006. He is enrolled in Medicare PECOS.
NPPES Registry Identity
Specialties & Licenses
Other Identifiers 6
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare (PECOS)
Carl Richard Williams Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).
Medicare Billing Reassignments
3Medicare enrollment records show Carl Williams reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Hyannis, MA 02601
- Reassigned Medicare billing, Massachusetts enrollment
- 57 clinicians in this Medicare group
Hyannis, MA 02601
- Reassigned Medicare billing, Massachusetts enrollment
- 423 clinicians in this Medicare group
Sandwich, MA 02563
- Reassigned Medicare billing, Massachusetts enrollment
- 129 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.
Physician 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.
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 Carl Williams's NPI number?
The NPI number for Carl Williams is 1639121908. It was assigned to this individual provider in the NPPES registry on May 16, 2006.
Where is Carl Williams located?
Carl Williams practices at 27 Park St, Hyannis, MA 02601. The listed phone number is (508) 862-5981.
What is Carl Williams's specialty?
The primary specialty registered for this NPI is Emergency Medicine with taxonomy code 207P00000X.
Is Carl Williams enrolled in Medicare?
Yes. Carl Williams is registered in the Medicare PECOS enrollment system.
Which organizations bill Medicare for Carl Williams's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Carl Williams reassigns Medicare benefits to 3 organizations: Cape Cod Emergency Associates LLP (Hyannis, MA), Medical Affiliates Of Cape Cod, Inc. (Hyannis, MA) and Urgi Center Medical Group (Sandwich, MA). 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 Carl Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
When was this NPI record last updated?
The NPPES record for Carl Williams was last updated on April 30, 2008. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 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.
# Carl Richard Williams, MD · NPI 1639121908
Emergency Medicine physician in Hyannis, Massachusetts. Individual provider, active in the CMS NPPES registry since May 16, 2006.
## Identity
- **NPI:** 1639121908 (Entity type: Individual)
- **Enumerated:** May 16, 2006
- **Primary specialty:** Emergency Medicine · taxonomy 207P00000X
- **State license:** 48576 (Massachusetts)
- **Sole proprietor:** No
## Practice location
- **Address:** 27 PARK ST, Hyannis, MA 02601-5230
- **Phone:** (508) 862-5981
## Medicare
- **Medicare:** Enrolled in Medicare (PECOS)
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 3 organizations under Medicare reassignment (form CMS-855R): Cape Cod Emergency Associates LLP (NPI 1396462958, Hyannis, MA); Medical Affiliates Of Cape Cod, Inc. (NPI 1770534927, Hyannis, MA); Urgi Center Medical Group (NPI 1902146798, Sandwich, MA) · CMS Revalidation Reassignment List, October 2026 release
## Record status
- **NPPES last updated:** April 30, 2008
- **Other identifiers:** Medicare PIN QX9752 (MA); Other L15150 (MA); Medicare PIN 930107004 (MA); and 3 more
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Source: [NPI Profile](https://npiprofile.com/npi/1639121908) · Data from the CMS NPPES public registry.