MELISSA WILLIAMS CAA
NPI 1831865559
Anesthesiologist Assistant in Marietta, GA

Q: What is Melissa Williams's NPI number?

The NPI number for Melissa Williams is 1831865559. It was assigned to this individual provider in the NPPES registry on August 22, 2021.

Q: What is Melissa Williams's specialty?

The primary specialty registered for this NPI is Anesthesiologist Assistant with taxonomy code 367H00000X.

Q: When was this NPI record last updated?

The NPPES record for Melissa Williams was last updated on April 19, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.

Active since August 22, 2021

677 CHURCH ST NE, MARIETTA, GA 30060(470) 956-4530 Get Directions Write a Review

NPPES record last updated: April 19, 2023. Verified against the NPPES registry weekly; last sync: November 01, 2026.

Record update history: Feb 21, 2023, Aug 22, 2021 (2 updates tracked since 2021).

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About Melissa Williams Caa NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

MELISSA WILLIAMS CAA (NPI 1831865559) is an individual anesthesiologist assistant in Marietta, Georgia, licensed in Georgia (11413) and active in the NPI registry since August 2021. She is affiliated with Wellstar Kennestone Regional Medical Center and is a graduate of Other (2022).

NPPES Registry Identity

NPI1831865559

Entity TypeIndividualFemale

Primary Taxonomy367H00000X

Provider Legal NameMELISSA WILLIAMSCredential: CAA

Location Address677 CHURCH ST NEMarietta, GA 30060-1101

Mailing Address100 Woodruff Cir NeAtlanta, GA 30322-1020 · (404) 727-5910

Phone(470) 956-4530

Sole ProprietorYes

Medical School CMSOtherGraduated 2022

Enumeration DateAugust 22, 2021

Last NPPES UpdateApril 19, 20232 updates tracked since enumeration

NPPES CertifiedApril 19, 2023

✔ NPI 1831865559 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyAnesthesiologist AssistantPhysician Assistants & Advanced Practice Nursing Providers

Taxonomy Code367H00000X

License✔ Licensed in GA · 11413

Definition

An individual certified by the state to perform anesthesia services under the direct supervision of an anesthesiologist. Anesthesiologist Assistants are required to have a bachelor's degree with a premed curriculum prior to entering a two-year anesthesiology assistant program, which is focused upon the delivery and maintenance of anesthesia care as well as advanced patient monitoring techniques. An Anesthesiologist Assistant must work as a member of the anesthesia care team under the direction of a qualified Anesthesiologist.

677 CHURCH ST NE, Marietta, GA 30060

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Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Alliant Health Plans, Inc., Oscar Health.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Melissa Williams Caa is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

PECOS PAC ID5395100333

PECOS Enrollment IDI20230427000495

Medicare Billing Reassignments

Medicare enrollment records show Melissa Williams reassigns Medicare billing to 3 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Wellstar Medical Group, LLC

Same address

Neurology

677 CHURCH ST NE
Marietta, GA 30060

Reassigned Medicare billing, Georgia enrollment
3,885 clinicians in this Medicare group

NPI 1083027320 (770) 422-2326

Mak Anesthesia Holdings LLC

2.9 mi

Anesthesiology

1300 RIDENOUR BLVD NW STE 300
Kennesaw, GA 30152

Reassigned Medicare billing, Georgia enrollment
629 clinicians in this Medicare group

NPI 1912452939 (770) 702-1806

Piedmont Anesthesia LLC

37 mi

Anesthesiology

1133 EAGLES LANDING PKWY
Stockbridge, GA 30281

Reassigned Medicare billing, Georgia enrollment
713 clinicians in this Medicare group

NPI 1700474244 (678) 604-1053

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 3

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.

Anesthesia for other procedure on esophagus, stomach, or upper small bowel using an endoscope 00731

This procedure involves the use of an endoscope, a flexible tube with a light and camera, to examine your esophagus, stomach, or upper small bowel. Anesthesia ensures you are comfortable and pain-free during the procedure.

15 services15 patients

Anesthesia for x-ray on artery of brain, heart, or chest 01926

Anesthesia is given before an x-ray of the brain, heart, or chest artery to ensure comfort and stillness. It helps to eliminate discomfort or pain during the procedure. It's administered by a trained professional, ensuring a safe and smooth procedure.

15 services15 patients

Anesthesia for x-ray or radiation therapy 01922

Anesthesia for x-ray or radiation therapy involves administering medication to help you relax or sleep during the procedure. It's used to ensure comfort, minimize movement, and reduce anxiety. The type of anesthesia used depends on the procedure and patient's health.

12 services12 patients

Hospital Affiliations CMS Care Compare 3

Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.

Wellstar Kennestone Regional Medical Center

Acute Care Hospitals · Marietta, GA

4/5 CMS rating

OwnershipGovernment - Hospital District or Authority

CMS Certification Number110035

Location677 Church StreetMarietta, GA 30060 · Cobb County

Emergency services Birthing friendly

Piedmont Rockdale Hospital

Acute Care Hospitals · Conyers, GA

2/5 CMS rating

OwnershipProprietary

CMS Certification Number110091

Location1412 Milstead Avenue, NEConyers, GA 30012 · Rockdale County

Birthing friendly

Wellstar Cobb Medical Center

Acute Care Hospitals · Austell, GA

2/5 CMS rating

OwnershipVoluntary non-profit - Other

CMS Certification Number110143

Location3950 Austell RdAustell, GA 30106 · Cobb County

Birthing friendly

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.

JILLIAN MARIE BLALOCK DO

Emergency Medicine

677 CHURCH ST NE
MARIETTA, GA 30060

Cobb County (770) 793-5000

JAMIN GRAHAM MD

Student in an Organized Health Care Education/Training Program

677 CHURCH ST NE
MARIETTA, GA 30060

Cobb County (770) 793-5000

SAUMYA S GURBANI MD, PHD

Radiology (Diagnostic Radiology)

677 CHURCH ST NE, ATTN: GME
MARIETTA, GA 30060

Cobb County (770) 793-7742

JULIA PATRICIA KENDRICK

Registered Nurse

677 CHURCH ST NE
MARIETTA, GA 30060

Cobb County (770) 793-5000

DR. HALEY PUCKETT LAWHORN MD

Student in an Organized Health Care Education/Training Program

677 CHURCH ST NE
MARIETTA, GA 30060

Cobb County (770) 793-5000

MRS. RHONDA KIM LEE NP-C

Registered Nurse (Wound Care)

677 CHURCH ST NE
MARIETTA, GA 30060

Cobb County (770) 793-7173

DEVIN HORTON CRNA

Nurse Anesthetist, Certified Registered

677 CHURCH ST NE
MARIETTA, GA 30060

Cobb County (770) 794-0477

BRITNEY ELIZABETH BECKETT

Student in an Organized Health Care Education/Training Program

677 CHURCH ST NE
MARIETTA, GA 30060

Cobb County (770) 793-5000

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 Melissa Williams's NPI number?

The NPI number for Melissa Williams is 1831865559. It was assigned to this individual provider in the NPPES registry on August 22, 2021.

Where is Melissa Williams located?

Melissa Williams practices at 677 Church St NE, Marietta, GA 30060. The listed phone number is (470) 956-4530.

What is Melissa Williams's specialty?

The primary specialty registered for this NPI is Anesthesiologist Assistant with taxonomy code 367H00000X.

Is Melissa Williams enrolled in Medicare?

Yes. Melissa Williams is registered in the Medicare PECOS enrollment system.

Which organizations bill Medicare for Melissa Williams's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Melissa Williams reassigns Medicare benefits to 3 organizations: Wellstar Medical Group, LLC (Marietta, GA), Mak Anesthesia Holdings LLC (Kennesaw, GA) and Piedmont Anesthesia LLC (Stockbridge, GA). 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 Melissa Williams's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Melissa Williams accept?

Health plans from Alliant Health Plans, Inc. and Oscar Health list Melissa Williams 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 Melissa Williams affiliated with any hospitals?

According to CMS data, Melissa Williams is affiliated with Wellstar Kennestone Regional Medical Center, Piedmont Rockdale Hospital and Wellstar Cobb Medical Center.

When was this NPI record last updated?

The NPPES record for Melissa Williams was last updated on April 19, 2023. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 3 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.