Georgia Medicaid Provider Enrollment and Credentialing: GAMMIS, the DCH CVO, Georgia Families CMOs and Palmetto GBA

Georgia splits the work into separate files with different owners. The standards column quotes only what the agency, plan or federal rule publishes; none of it predicts a specific application.

Physicians, physician assistants and several other professions are licensed by the Georgia Composite Medical Board, whose Verify a Licensee lookup is what DCH and every plan check against. A license record that disagrees with your application is the quickest way to stall all of the rows above at once.

GAMMIS provider enrollment starts at mmis.georgia.gov, under Provider Enrollment, Enrollment Wizard. Section 105.1 of DCH's Part I Policies and Procedures manual (version July 1, 2026) requires the application to be filed online through the third-party administrator's site, and approval depends on verifying every enrollment requirement, which may include a site audit of your office. The Enrollment Wizard page adds that the wizard saves after each step and that you can start, continue or withdraw an application.

1. Get the NPI paperwork in hand. Section 105.1.4 requires a copy of your NPPES confirmation letter or email with the application.
2. Match the tax ID to the IRS. Section 105.4 says the EIN or SSN must be identical to what the IRS has, requires IRS confirmation of the payee's tax ID, and warns that a mismatch triggers 31% backup withholding on every Medicaid payment, refundable only by the IRS.
3. Enroll each location. Georgia enrolls a provider at each location where Medicaid or PeachCare members are seen (105.1.1). A provider who moves to a new office files an Additional Location application rather than editing the old one (105.9).
4. Choose the right category of service. Provider-type qualifications live in chapter 600 of the program-specific Part II manual for your specialty, so read it before you pick a specialty in the wizard.
5. Upload everything, then submit. The wizard will not let you submit until required documents are attached. Keep the Application Tracking Number it assigns.
6. Answer requests inside 10 days. DCH may reject an application as incomplete, and requested documents are due within 10 days of the request unless you have arranged otherwise (105.2.3).

Out-of-state practices within 50 miles of the Georgia border that routinely treat Georgia members may enroll with in-state status, subject to any mileage rules in the Part II manual for their category (105.1.3). That matters to border-market practices such as those in Chattanooga, Jacksonville, Dothan or North Augusta.

Georgia now expects a group or billing provider record in GAMMIS for professional claims. A CareSource provider notice approved by DCH on February 17, 2026 says the requirement took effect January 1, 2026, and applies to providers who submit professional claims, practice in a clinic or group, or bill with a billing NPI different from the rendering provider's. The steps it lists:

1. In GAMMIS, open Provider Enrollment, then Enrollment Wizard.
2. Submit a Group/Billing Provider application, using the existing payee Medicaid ID if you have one.
3. Affiliate every rendering provider to the group.

The notice says a group Medicaid ID is generally needed for each service location address, only one group application should be filed per location or billing NPI, and rendering providers must be affiliated before any claim goes out. It gives providers 45 days from notification to finish, and warns of denials when the billing NPI is not enrolled or the rendering provider is not affiliated.

One wrinkle: the July 2026 Part I manual still contains an older sentence (105.1.1) saying the Division does not enroll group practices in fee-for-service. The newer group/billing instruction is what the claims edits enforce, so enroll the group first and then the affiliations, and confirm the order with the Gainwell contact center if your file predates 2026.

Georgia does not make you credential separately with each Medicaid health plan. Since 2015, DCH has run an NCQA-certified centralized Credentialing Verification Organization, reached through GAMMIS, for providers in Georgia Families and Georgia Families 360°. DCH's Centralized CVO page says the CVO does primary source verification, checks state and federal databases, pulls information from Medicare's PECOS, and verifies malpractice coverage and DEA registration, and then a Credentialing Committee decides. The Part I manual defines that committee as nine voting members who also review site visits, criminal background checks and fingerprinting where they apply.

• Time standard: "Complete applications will receive a decision within 45 calendar days," per DCH; incomplete ones are returned with a request for the missing material.
• One application: the Enrollment Wizard is described as "a one source application for both fee-for-service Medicaid and CMO."
• Who is outside it: DCH's CVO FAQ (July 14, 2015) excludes independent practice associations and physician hospital organizations that credential for the CMOs under delegation; pharmacies are excluded too, per Amerigroup's join page.
• No fee for credentialing itself, according to the same FAQ, apart from the federal application fee that applies to institutional types.
• Help line: Gainwell provider representatives at 1-800-766-4456; CVO policy questions go to cvo.dch@dch.ga.gov.

The FAQ also explains why practices sometimes see early recredentialing: if you were in more than one CMO with different dates, the CVO's cycle keys off the earliest one.

DCH's Georgia Families page names three care management organizations: Amerigroup Community Care, CareSource and Peach State Health Plan. A positive CVO decision is shared with all of them, but the FAQ is explicit that "contracting and credentialing are separate and distinct processes," and each plan chooses whom to add.

The roster is in transition. DCH's Georgia Families news page reports that on December 2, 2024 the state issued a Notice of Intent to Award the next contract to CareSource, Humana, Molina and UnitedHealthcare, with UnitedHealthcare named for Georgia Families 360°. An update posted April 23, 2026 says the procurement is in the protest phase pending a Notice of Award, and that DCH is extending the current three CMO contracts through June 30, 2027. Practices planning for 2027 should expect to need contracts with whichever plans are finally awarded; the CVO credentialing carries across, the contracts do not.

Georgia assigns every category of service a federal risk level, defined in the Part I manual's definitions section, and the level decides how deep screening goes under 42 CFR 455 subpart E:

• Limited: physicians and non-physician practitioners (advanced nurse practitioners, occupational therapists, speech-language pathologists, audiologists, dietitians), medical groups and clinics, ASCs, FQHCs, hospitals, rural health clinics, nursing facilities and pharmacies.
• Moderate: ambulance services, hospice, independent clinical labs, physical therapists, and revalidating home health and DME providers. Moderate and high levels get unscheduled, unannounced site visits (105.14.1).
• High: community mental health centers, plus home health agencies and DME suppliers at their first enrollment. Owners of high-risk providers are fingerprinted at enrollment, re-enrollment and re-credentialing (105.14.3), and anyone with a 5% or greater ownership interest who does not submit fingerprints within 30 days of a request can cost the provider its enrollment (105.12.8).

A site visit that finds the office closed, not operating or at a different address triggers a second unannounced visit, and a second miss means denial, suspension or termination. Keep the GAMMIS service address identical to the door a reviewer will knock on.

On the fee, section 105.3 exempts individual physicians and non-physician practitioners, providers enrolled in Medicare or another state's Medicaid or CHIP, and anyone who already paid a Medicare contractor or another state. The institutional categories that do pay include independent labs, pharmacies, DME, ambulance, community mental health, FQHCs, rural health clinics, hospitals, nursing facilities, home health, ASCs, hospice and dialysis. CMS sets the amount each calendar year; the manual's own fee paragraph still cites an older year, so check the current figure before writing the check.

The effective date controls which visits Georgia Medicaid will ever pay. Under section 105.1.2 it is the first day of the month DCH received the application, or the licensure or certification date if that comes later, and section 105.2.1 says nothing before that date is reimbursed. A file submitted on the 2nd of a month therefore carries more cover than one submitted on the 30th of the month before it is rejected and refiled.

Section 105.5 allows up to six additional months of retroactive enrollment, but only on a written request made within 60 days of the original approval notice, and only for causes outside the provider's control. The manual lists what does not qualify: turnover in office or billing staff, a change in office procedures, poor coordination over signatures, internal delays getting forms, and claims lost in transit. A rejected application that is refiled gets the first day of the month of the new submission, with no retro.

Pair that with timely filing. Section 203.1.3 denies a claim not received within six months after the month of service. A provider seeing Medicaid members while the enrollment is pending is betting on both the effective date and that six-month window.

Georgia revalidates more often than the federal five-year floor. Section 105.15 says the Division will revalidate "all providers regardless of provider type at least every three years," running the full credentialing work again, background checks and site visits included. The deadlines are stacked in 60-day blocks: submit within 60 days of the re-credentialing notice or be suspended; submit within 60 days of suspension or be terminated; and once submitted, finish the process within 60 days or be terminated.

DCH has been enforcing it. An alert on the GAMMIS Enrollment Wizard page posted May 25, 2026 says providers who had not revalidated were suspended effective July 1, 2026; claims with dates of service on or after that date are not paid; revalidating lifts the suspension but the effective date becomes the submission date with no retro; and providers who do not revalidate within 30 days of the suspension notice are terminated with appeal rights. GAMMIS publishes a "Provider Revalidation Past Due" report under Provider Information, Reports for Public Access, which is worth checking for every NPI on your roster.

Two related rules from section 105.8 catch dormant numbers: a provider number with no claim for 12 months is suspended as inactive, and at 16 months it is terminated and needs a new enrollment, with no retroactive date.

To check Georgia Medicaid enrollment status, open Enrollment Application Status in GAMMIS and enter the Application Tracking Number with the business name or provider last name exactly as it appears on your notice; DCH's revalidation FAQ (revised June 12, 2014) describes that lookup, and the same screen gives you a link to upload a license or Change of Information form against the ATN. The Enrollment Wizard itself also tracks status for applications you started there.

Two GAMMIS pages are worth bookmarking alongside it: Provider Contract Status, and the EFT Agreement. For a person, the GAMMIS phone list gives the provider contact center at (770) 325-9600 or (800) 766-4456 and EDI services at (877) 261-8785. Have the ATN, NPI and tax ID ready before calling.

After approval, changes to address, payee or office location must be reported within 10 days through GAMMIS (105.9). Putting a new address on claims does not update the file, and payments keep going to the payee on record.

A physician or practitioner who only orders, prescribes or refers still has to be known to Georgia Medicaid. The Part I manual says claims for ordered, prescribed or referred services must carry the OPR practitioner's individual NPI, and if that NPI belongs to someone not enrolled in Georgia Medicaid, "the claim will not be paid." OPR-only applicants use the same process but submit a shorter set: the enrollment application, their professional license, and DEA registration if they have one (105.1.5). Their retro window is tighter: the application has to reach the administrator within 60 days of the date of service.

This is the enrollment most often missed by hospitalists, telehealth prescribers and specialists across a state line whose orders land on a Georgia lab, imaging center or DME claim.

Georgia's Medicare Part A and Part B contractor is Palmetto GBA, the Jurisdiction J A/B MAC that also covers Alabama and Tennessee. The CMS Medicare fee-for-service provider enrollment contact list shows Palmetto's provider enrollment line as 877-567-7271 and its Part B enrollment mailbox as P.O. Box 100306, Columbia, SC 29202. Individual practitioners file the CMS-855I in PECOS (reassigning benefits to the group on the same form), groups file the CMS-855B, and Palmetto issues the PTAN. Our Medicare provider enrollment page walks through which form fits which provider.

Palmetto does not publish its own processing figures; CMS sets one table for every MAC in the Program Integrity Manual, chapter 10:

Medicare's backdating is limited. Under 42 CFR 424.521, physicians and non-physician practitioners can reach back no more than 30 days before their effective date when circumstances prevented earlier enrollment (90 days after a Presidentially declared disaster). Anything older is not billable to Medicare.

Railroad Medicare in Georgia is processed by Palmetto GBA too, but through its national Railroad Medicare unit, so the Part B PTAN that Jurisdiction J issued you does not cover patients enrolled through the Railroad Retirement Board. Palmetto's Enroll in Railroad Medicare page (published January 13, 2026) says you must be enrolled in Part B first, then request a Railroad PTAN with the PTAN Lookup and Request Tool. You do not file another CMS-855. Palmetto says to expect up to 30 days, dates the Railroad PTAN to match your Part B effective date, and handles EDI enrollment for railroad claims as its own request.

Because the same company runs both, Georgia offices often assume one number covers both. It does not, and the first railroad retiree's claim is where that assumption gets expensive.

Georgia's commercial plans credential mostly from your CAQH ProView profile, and the profile has to be re-attested on CAQH's 120-day cycle (CAQH quick reference). One missed attestation freezes every Georgia plan that reads the profile at the same moment. Setup is explained on our CAQH explained page; plan-specific steps for Aetna, Cigna, UnitedHealthcare, Humana and the Blues sit in our credentialing hub by payer.

Georgia legislators have looked at a commercial credentialing deadline. House Bill 1354 as introduced (26 LC 52 1011) would have required insurers offering a network plan to approve complete credentialing applications within 45 days, using a standardized application built on the Medicaid credentialing system. A House committee substitute (26 LC 52 1060S) moved the rule to Chapter 24 of Title 33, kept the 45 days, had the Department of Insurance and DCH build the standardized application, required insurers to use it by July 1, 2027, and listed a July 1, 2026 effective date. We could not confirm that either version became law, so treat the 45 days as a proposal, not a right.

Most Georgia files that stall do so because the provider's own records disagree with each other. GAMMIS compares the application with outside sources, and so does the CVO, so any mismatch surfaces as a return. The ones we see most:

• Tax ID or legal name that differs from the IRS letter. Georgia requires an exact match and withholds 31% of payments when it is wrong.
• An application left open past 10 days. GAMMIS rejects unsubmitted applications after 10 days, and a rejected file loses its month.
• Late answers to DCH requests. The 10-day response window is short for a practice where the doctor signs once a week.
• A rendering provider not affiliated to the group. Claims deny even though both records exist.
• Address drift. The service address in GAMMIS, NPPES, the board record, CAQH and the site-visit door all have to be the same place.
• Missed revalidation notices sent to a mail-to or email address nobody watches, which in 2026 meant suspension.
• A lapsed license, DEA or malpractice certificate while the CVO is verifying.
• No Railroad PTAN, discovered months after Medicare approval.

That is why our process is mostly checking and chasing: one file compared field by field across GAMMIS, NPPES, the Composite Medical Board, CAQH and PECOS before anything is submitted, then weekly follow-up with every payer, with each call's rep, date and reference number written into the file.

For a Georgia physician or practitioner: individual and group NPIs with the NPPES confirmation, the IRS letter confirming the legal name and tax ID, the Georgia license and its dates, DEA registration, board certification if any, the malpractice certificate, ownership and managing-employee details for the group, every service location, bank details for the EFT agreement, a current CAQH profile, and the Palmetto approval letter once Medicare is done. The intake checklist we send new Georgia clients, with the secure upload route, lives on our what-we-need page.

If the difference between credentialing, enrollment and contracting is still fuzzy, what provider credentialing is sets them side by side, and the federal Medicaid rules every state follows are on Medicaid provider enrollment. Neighboring and other states: Alabama, Florida and Kentucky.

ClaimCarePro handles Georgia Medicaid enrollment in GAMMIS, the group and rendering affiliations, the DCH CVO application, contracts with the Georgia Families CMOs, Medicare through Palmetto GBA, the Railroad Medicare PTAN, CAQH and the commercial plans, chasing every payer weekly and keeping a call log you can read. Our prices are flat: $250 per payer application per provider, CAQH setup $250, re-credentialing $250, maintenance $99 per provider per year, or the new-practice bundle at $1,750 per provider ($1,400 each additional provider on the same group and payers). Start credentialing now and get a secure start link within one business hour, or call (844) 772-8902. Details are on provider credentialing services, and the three-year cycle is covered on recredentialing.

Updated October 23, 2026. We read each source on October 23, 2026 except where a different date is shown. When DCH, a CMO or CMS revises a rule, trust the linked page over this guide. This is not legal advice.

• Georgia DCH, Part I Policies and Procedures for Medicaid/PeachCare for Kids, version July 1, 2026: mmis.georgia.gov (definitions and risk levels; sections 105.1-105.16 on enrollment, fees, tax ID, retro, inactivity, changes, screening and re-credentialing; 203.1.3 timely filing)
• GAMMIS home page and Provider Enrollment menu: mmis.georgia.gov
• GAMMIS Enrollment Wizard page, incl. revalidation alert posted May 25, 2026: mmis.georgia.gov
• GAMMIS Enrollment Application Status: mmis.georgia.gov
• GAMMIS Phone Numbers and Links: mmis.georgia.gov
• DCH, Centralized CVO: dch.georgia.gov (45 calendar days; CMO contacts; Gainwell 1-800-766-4456)
• DCH, Credentialing Verification Organization Process FAQ (July 14, 2015): dch.georgia.gov
• DCH, Medicaid Provider Enrollment Revalidation FAQ (revised June 12, 2014; cited only for the ATN status lookup): dch.georgia.gov
• DCH, Georgia Families: medicaid.georgia.gov; Georgia Families Latest News (updates posted December 26, 2024 and April 23, 2026): medicaid.georgia.gov
• CareSource, Group/Billing Provider Enrollment in GAMMIS, GA-MED-P-5100900 (DCH approved February 17, 2026): caresource.com
• Amerigroup Community Care, Georgia, Join our network: provider.amerigroup.com
• Peach State Health Plan, Become a Provider: pshpgeorgia.com
• Georgia House Bill 1354 (2026), as introduced, 26 LC 52 1011: legis.ga.gov; committee substitute, 26 LC 52 1060S: legis.ga.gov
• CMS, Medicare Fee-for-Service Provider Enrollment Contact List (Palmetto GBA, Georgia): cms.gov
• CMS, Medicare Program Integrity Manual, chapter 10 (read October 23, 2026 for our Medicare enrollment page): cms.gov
• 42 CFR 424.521 (read October 23, 2026 for our Medicare enrollment page): ecfr.gov; 42 CFR 455 subpart E, provider screening: ecfr.gov
• Palmetto GBA, Enroll in Railroad Medicare (published January 13, 2026; read October 23, 2026 for our Medicare enrollment page): palmettogba.com
• Georgia Composite Medical Board, Verify a Licensee: medicalboard.georgia.gov
• CAQH ProView Provider Quick Reference (read October 16, 2026 for our CAQH page): caqh.org

Not found, and therefore not stated: a credentialing or contracting timeline published by Amerigroup, CareSource or Peach State; the final status of HB 1354; a current fee amount in the Part I manual (its paragraph still cites an older calendar year); a Georgia statute setting a commercial credentialing deadline; and any Palmetto processing statistics of its own (only the CMS table applies).