William Martin Schnitz, MD

Primary specialty

Rheumatology PhysicianTaxonomy code 207RR0500X

License

16521 Issued in OK

Practice address

3555 NW 58TH St Ste 804
Oklahoma City, OK 73112-4703

Phone

(405) 548-0430

Fax

(405) 463-4408

NPI assigned

May 31, 2006

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Enrolled in OK, TX2 enrollments

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 2

Specialty

Rheumatology

Education

Other, 1987

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Optimum Primary Care PLLCGroup PAC ID 2264853928, 14 clinicians

Absentee Shawnee Tribal Health Authority, IncGroup PAC ID 5799171088, 83 clinicians

Central Oklahoma American Indian Health Council, Inc.Group PAC ID 3476617374, 60 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Stillwater Medical Center Hospital, Stillwater, OK, CCN 370049
• Integris Baptist Medical Center, Inc Hospital, Oklahoma City, OK, CCN 370028
• Onecore Health Hospital, Oklahoma City, OK, CCN 370220
• SSM Health St Anthony Hospital - Shawnee Hospital, Shawnee, OK, CCN 370149
• O U Medical Center Hospital, Oklahoma City, OK, CCN 370093

Merit-based Incentive Payment System (MIPS)

Final score

0 of 100Reported as individual

Quality

0

Improvement activities

0

Cost

0

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: william.schnitz.1@19011.direct.athenahealth.com

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

• Absentee Shawnee Tribal Health Authority, Inc.

  • Multi-Specialty Clinic/Center
  • Shawnee, OK
  • NPI 1942253521
  Medicare reassignment Care Compare group NPD
• Central Oklahoma American Indian Health Council, Inc.

  • Federally Qualified Health Center (FQHC)
  • Oklahoma City, OK
  • NPI 1407969728

  TX

  Medicare reassignment Care Compare group NPD
• William M Schnitz MD PC

  • Rheumatology Physician
  • Oklahoma City, OK
  • NPI 1205968435
  Medicare reassignment NPD Authorized official
• Optimum Primary Care PLLC

  • Internal Medicine Physician
  • Edmond, OK
  • NPI 1760030399
  Medicare reassignment Care Compare group
• Rheumatic Diseases Clinic of Oklahoma, PLLC

  • Specialist
  • Oklahoma City, OK
  • NPI 1942691175
  Medicare reassignment NPD
• Absentee Shawnee Tribal Health Authority, Inc.

  • Multi-Specialty Clinic/Center
  • Norman, OK
  • NPI 1124152962
  NPD
• Jackson County Memorial Hospital Authority

  • General Acute Care Hospital
  • Altus, OK
  • NPI 1093763781
  NPD (past)
• Summit Medical Center

  • General Acute Care Hospital
  • Edmond, OK
  • NPI 1356574560
  NPD (past)

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

• Hospital for Special Surgery L L C

  • General Acute Care Hospital
  • Oklahoma City, OK
  • NPI 1851344188
  Care Compare affiliation
• Integris Baptist Medical Center Inc

  • Psychiatric Hospital Unit
  • Oklahoma City, OK
  • NPI 1598837221
  Care Compare affiliation
• Integris Baptist Medical Center Inc

  • Psychiatric Hospital Unit
  • Spencer, OK
  • NPI 1659443372
  Care Compare affiliation
• Integris Baptist Medical Center Inc

  • General Acute Care Hospital
  • Oklahoma City, OK
  • NPI 1831103654
  Care Compare affiliation
• Integris Baptist Medical Center Inc

  • Psychiatric Hospital Unit
  • Spencer, OK
  • NPI 1881760759
  Care Compare affiliation
• Ou Medicine Inc.

  • General Acute Care Hospital
  • Oklahoma City, OK
  • NPI 1649794157
  Care Compare affiliation
• St Anthony Shawnee Hospital Inc

  • General Acute Care Hospital
  • Shawnee, OK
  • NPI 1134123193
  Care Compare affiliation
• Stillwater Medical Center Authority

  • General Acute Care Hospital
  • Stillwater, OK
  • NPI 1164494027
  Care Compare affiliation

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

{
    "created_epoch": "1149033600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1784505600000",
    "number": "1629015763",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3555 NW 58TH ST STE 804",
            "city": "OKLAHOMA CITY",
            "state": "OK",
            "postal_code": "731124703",
            "telephone_number": "405-548-0430",
            "fax_number": "405-463-4408"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3555 NW 58TH ST STE 804",
            "city": "OKLAHOMA CITY",
            "state": "OK",
            "postal_code": "731124703",
            "telephone_number": "405-548-0430",
            "fax_number": "405-463-4408"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SCHNITZ",
        "first_name": "WILLIAM",
        "middle_name": "MARTIN",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2006-05-31",
        "last_updated": "2026-07-20",
        "certification_date": "2026-07-20",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RR0500X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Rheumatology",
            "state": "OK",
            "license": "16521",
            "primary": true
        },
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "OK",
            "license": "16521",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "100095820B",
            "state": "OK"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Kristine Schneberger, M.S.,CCC-SLP
• Kathryn Ann Schneider
• Lisa M Schneider
• Tara Ann Schneider, PHARM.D.
• Amy Dee Schnitz, DPH
• Megan Schnoebelen
• Robert Stephen Schoaps, M.D.
• Katherine Schoeffler
• Michael E Schoeffler, M.D.
• Lisa Marie Schoelen, LPC

• Rheumatology Physician in Oklahoma City, OK
• Providers in Oklahoma City, OK by specialty
• Rheumatology Physician in Oklahoma

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 20, 2026; 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.