William S Jonas, M.D.

Primary specialty

Hematology & Oncology PhysicianTaxonomy code 207RH0003X

License

052586 Issued in GA

Practice address

1800 Howell Mill Rd NW Ste 800
Atlanta, GA 30318-0922

Phone

(404) 350-9853

Fax

(404) 350-8407

NPI assigned

Jun 9, 2006

Last updated

Sep 12, 2025By the provider in NPPES

Sex

Male

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in GA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Hematology/OncologyAlso: Internal Medicine

Education

Hahneman Medical College of the Pacific, 2000

Medicare assignment

May accept Medicare assignment

Telehealth

Offers telehealth services

Group practices

Piedmont Cancer Institute PCGroup PAC ID 9638167844, 43 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Accentcare Home Health of Georgia Home health agency, Roswell, GA, CCN 117131
• Piedmont Hospital, Inc Hospital, Atlanta, GA, CCN 110083
• Piedmont Mountainside Hospital Inc Hospital, Jasper, GA, CCN 110225
• Piedmont Fayette Hospital Hospital, Fayetteville, GA, CCN 110215
• Piedmont Athens Regional Medical Center Hospital, Athens, GA, CCN 110074
• Piedmont Henry Hospital Hospital, Stockbridge, GA, CCN 110191

Merit-based Incentive Payment System (MIPS)

Final score

100 of 100Reported as group

Promoting interoperability

100

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: wjonas@piedmontcancerinstitute.direct.varian.com

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• Piedmont Cancer Institute PC

  dba Peachtree Hematology Oncology Consultants

  • Hematology & Oncology Physician
  • Atlanta, GA
  • NPI 1336180637
  Medicare reassignment Care Compare group NPD
• Piedmont Cancer Institute PC

  dba Peachtree Hematology-Oncology Consultants PC

  • Community/Retail Pharmacy
  • Atlanta, GA
  • NPI 1831268606

  Hematology & Oncology

  NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• Fayette Community Hospital, Inc.

  dba Piedmont Fayette Hospital

  • General Acute Care Hospital
  • Fayetteville, GA
  • NPI 1528027240
  Care Compare affiliation
• Guardian Home Care, LLC

  dba AccentCare Home Health of Georgia

  • Home Health Agency
  • Roswell, GA
  • NPI 1992736227
  Care Compare affiliation
• Piedmont Athens Regional Medical Center, Inc.

  • General Acute Care Hospital
  • Athens, GA
  • NPI 1437186111
  Care Compare affiliation
• Piedmont Henry Hospital, Inc.

  • General Acute Care Hospital
  • Stockbridge, GA
  • NPI 1225034333
  Care Compare affiliation
• Piedmont Hospital, Inc

  dba Piedmont Hospital

  • General Acute Care Hospital
  • Atlanta, GA
  • NPI 1962461681
  Care Compare affiliation
• Piedmont Mountainside Hospital, Inc.

  dba Piedmont Mountainside Hospital

  • General Acute Care Hospital
  • Jasper, GA
  • NPI 1780643411
  Care Compare affiliation

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1149811200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757635200000",
    "number": "1962443051",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1800 HOWELL MILL RD NW STE 800",
            "city": "ATLANTA",
            "state": "GA",
            "postal_code": "303180922",
            "telephone_number": "404-350-9853",
            "fax_number": "404-477-1162"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1800 HOWELL MILL RD NW STE 800",
            "city": "ATLANTA",
            "state": "GA",
            "postal_code": "303180922",
            "telephone_number": "404-350-9853",
            "fax_number": "404-350-8407"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "1240 Eagles Landing Pkwy Ste 260",
            "address_purpose": "LOCATION",
            "city": "Stockbridge",
            "state": "GA",
            "postal_code": "302815173",
            "country_code": "US",
            "telephone_number": "678-854-9500",
            "fax_number": "678-854-9502",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "775 Poplar Rd Ste 310",
            "address_purpose": "LOCATION",
            "city": "Newnan",
            "state": "GA",
            "postal_code": "302658303",
            "country_code": "US",
            "telephone_number": "770-251-2590",
            "fax_number": "770-251-1490",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "1267 Highway 54 W Ste 4200",
            "address_purpose": "LOCATION",
            "city": "Fayetteville",
            "state": "GA",
            "postal_code": "302142112",
            "country_code": "US",
            "telephone_number": "678-829-1060",
            "fax_number": "678-829-1099",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "JONAS",
        "first_name": "WILLIAM",
        "middle_name": "S",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-09",
        "last_updated": "2025-09-12",
        "certification_date": "2020-05-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "GA",
            "license": "052586",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Hematology & Oncology Physician in Atlanta, GA
• Providers in Atlanta, GA by specialty
• Hematology & Oncology Physician in Georgia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 12, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.