Michael James Polydefkis, M.D.

Primary specialty

Neurology PhysicianTaxonomy code 2084N0400X

License

D53022 Issued in MD

Practice address

600 N Wolfe St
Baltimore, MD 21287-0005

Phone

(410) 955-9441

NPI assigned

Jun 13, 2006

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other identifiers 3

Medicare fee-for-service enrollment

Enrolled in MD

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

Neurology

Education

Johns Hopkins University School of Medicine, 1993

Medicare assignment

May accept Medicare assignment

Telehealth

Offers telehealth services

Group practices

Johns Hopkins UniversityGroup PAC ID 8921903147, 2,886 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Johns Hopkins Bayview Medical Center Hospital, Baltimore, MD, CCN 210029
• Johns Hopkins Hospital, the Hospital, Baltimore, MD, CCN 210009

Merit-based Incentive Payment System (MIPS)

Final score

83.31 of 100Reported as group

Quality

73.89

Promoting interoperability

100

Improvement activities

40

Cost

70.47

Procedures performed for Medicare patients

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: mpolydefkis12703@direct.hopkinsmedicine.org

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.

• Johns Hopkins University

  • Pain Medicine (Anesthesiology) Physician
  • Baltimore, MD
  • NPI 1922008549
  Medicare reassignment Care Compare group NPD
• Johns Hopkins University

  • Neurology Physician
  • Baltimore, MD
  • NPI 1356346100
  NPD
• Johns Hopkins University

  • Ophthalmology Physician
  • Belcamp, MD
  • NPI 1376342774
  NPD
• Frederick Health Hospital Inc

  • General Acute Care Hospital
  • Frederick, MD
  • NPI 1538165527
  NPD (past)

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

• Johns Hopkins Bayview Medical Center Inc

  • General Acute Care Hospital
  • Baltimore, MD
  • NPI 1790700904
  Care Compare affiliation
• Johns Hopkins Bayview Medical Center, Inc.

  • Chronic Disease Hospital
  • Baltimore, MD
  • NPI 1336251412
  Care Compare affiliation
• The Johns Hopkins Hospital

  • General Acute Care Hospital
  • Baltimore, MD
  • NPI 1578597993
  Care Compare affiliation

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

{
    "created_epoch": "1150156800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1768521600000",
    "number": "1194768614",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6201 GREENLEIGH AVE",
            "city": "MIDDLE RIVER",
            "state": "MD",
            "postal_code": "212202004",
            "telephone_number": "410-955-5000"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "600 N WOLFE ST",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212870005",
            "telephone_number": "410-955-9441"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "POLYDEFKIS",
        "first_name": "MICHAEL",
        "middle_name": "JAMES",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-06-13",
        "last_updated": "2026-01-16",
        "certification_date": "2026-01-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "291U00000X",
            "taxonomy_group": "",
            "desc": "Clinical Medical Laboratory",
            "state": "MD",
            "license": "D0053022",
            "primary": false
        },
        {
            "code": "2084N0400X",
            "taxonomy_group": "",
            "desc": "Psychiatry & Neurology, Neurology",
            "state": "MD",
            "license": "D53022",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "965102100",
            "state": "MD"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "D0053022",
            "state": "MD"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "235588400",
            "state": "MD"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Marla L Polo-Zisa, P.A.-C
• Amy Polonsky, MD
• Mikhael Polotsky, M.D.
• Chardonnay Polson
• Angela Jean Poltrack, CRNP
• Richard Michael Pomerantz
• Stephen M Pomerantz, MD
• Greg Charles Pommier
• Nyla Pompey
• Leise Montebon Ponce, OTR/L

• Neurology Physician in Baltimore, MD
• Providers in Baltimore, MD by specialty
• Neurology Physician in Maryland

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 16, 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.