Individual provider Active NPI

Joy A Hammack, CRNA

  • Certified Registered Nurse Anesthetist
  • Baltimore, MD
National Provider Identifier
1831435023
Registry record updated Oct 16, 2024
On this page

Key facts

NPPES NPI Registry
Primary specialty
Certified Registered Nurse AnesthetistTaxonomy code 367500000X
License
91236 Issued in MD
Practice address
22 S Greene St
Baltimore, MD 21201-1544
Phone
(800) 492-5538
NPI assigned
Dec 17, 2012
Last updated
Oct 16, 2024By the provider in NPPES
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Oct 16, 2024

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Certified Registered Nurse Anesthetist 367500000X 91236 MD Primary
Registered Nurse 163W00000X R177586 MD

Addresses

Primary practice location

22 S Greene St
Baltimore, MD 21201-1544

Mailing address

3230 Orient Fishtail Rd
Laurel, MD 20724-2931
Phone (443) 852-5591

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in MD

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20130411000255 MD Practitioner - Certified Registered Nurse Anesthetist (Crna) 8123264454 Reassigns benefits to 8 organizations

Care Compare profile

Medicare Care Compare
Specialty
Certified Registered Nurse Anesthetist (Crna)
Education
Other, 2012
Medicare assignment
May accept Medicare assignment
Group practices
Anesthesia Solutions, LLCGroup PAC ID 3971651126, 10 clinicians
Johns Hopkins UniversityGroup PAC ID 8921903147, 2,886 clinicians
Blackwell Anesthesia LLCGroup PAC ID 9032563614, 7 clinicians
Ultracare Anesthesia Partners LLCGroup PAC ID 4082920525, 78 clinicians
Katzen Medical Associates PCGroup PAC ID 9436051232, 24 clinicians

Practice addresses (Care Compare)

1111 Beards Hill Rd
Suite 700
Aberdeen, MD 21001-2275
Phone (240) 394-4365

5755 Cedar LN
Columbia, MD 21044-2999
Phone (410) 740-7890

6011 University Blvd
Suite 190
Ellicott City, MD 21043-6104
Phone (410) 461-0960

6231 N Charles St
Baltimore, MD 21212-1113
Phone (410) 377-2044

901 Dulaney Valley Rd
Suite 220
Towson, MD 21204-0621
Phone (410) 583-1000

Hospital & facility affiliations

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

Merit-based Incentive Payment System (MIPS)

Final score
15 of 100Reported as group
Quality
0
Improvement activities
40

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Certified Registered Nurse

State licenses

LicenseStateTypeSpecialty
91236MDMDCertified Registered Nurse Anesthetist

Practice roles

OrganizationSpecialtyStatusNew patients
Blackwell Anesthesia LLC Nurse Anesthetist, Certified Registered CurrentSince Feb 1, 2025 Accepting new patients
Hitchens and Henke, PA Nurse Anesthetist, Certified Registered CurrentSince Sep 15, 2023 Accepting new patients
Maryland Expresscare LLC CurrentSince Mar 4, 2013 Accepting new patients
Johns Hopkins University Nurse Anesthetist, Certified Registered CurrentSince Jun 1, 2015 Accepting new patients
Katzen Medical Associates, PC CurrentSince Oct 1, 2024 Accepting new patients
Johns Hopkins University CurrentSince Jun 1, 2015 Accepting new patients
Ultracare Anesthesia Partners LLC Nurse Anesthetist, Certified Registered CurrentSince Jul 1, 2025 Accepting new patients
Hitchens and Henke, PA Nurse Anesthetist, Certified Registered CurrentSince Jun 3, 2025 Accepting new patients
University of Maryland Medical System Corporation Nurse Anesthetist, Certified Registered CurrentSince Mar 4, 2013 Accepting new patients
Bestgate Anesthesia LLC Nurse Anesthetist, Certified Registered CurrentSince Dec 12, 2023 Accepting new patients
Johns Hopkins University Current Accepting new patients
The Maryland Center for Digestive Health LLC PastSince Jun 13, 2018 Accepting new patients

Locations

820 Bestgate Rd
Ste 1A
Annapolis, MD 21401

22 S Greene St
Baltimore, MD 21201
Phone (410) 328-5793

301 Saint Paul St
Ste 902
Baltimore, MD 21202
Phone (410) 727-8380

600 N Wolfe St
Baltimore, MD 21287

6231 N Charles St
Baltimore, MD 21212
Phone (410) 377-2044

6231 N Charles St
Ste 1
Baltimore, MD 21212
Phone (410) 337-2044

11085 Little Patuxent Pkwy
Ste 4
Columbia, MD 21044
Phone (410) 730-0099

5755 Cedar Ln
Columbia, MD 21044
Phone (410) 381-7171

6011 University Blvd
Ste 190
Ellicott City, MD 21043
Phone (301) 604-2010

9512 Harford Rd
Ste 5
Parkville, MD 21234
Phone (410) 633-4466

901 Dulaney Valley Rd
Ste 220
Towson, MD 21204
Phone (410) 583-1000

3301 S 14th St
Ste 16180
Abilene, TX 79605

Interoperability endpoints

  • Direct secure messaging: jgonzalez120686@direct.hopkinsmedicine.org
  • Direct secure messaging: joy.hammack.p1@direct.katzeneye.nextgenshare.com

Organizations & group practices 13

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.

View all 13

Hospital & facility affiliations 1

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

NPI Registry JSON

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

{
    "created_epoch": "1355702400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1729036800000",
    "number": "1831435023",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3230 ORIENT FISHTAIL RD",
            "city": "LAUREL",
            "state": "MD",
            "postal_code": "207242931",
            "telephone_number": "443-852-5591"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "22 S GREENE ST",
            "city": "BALTIMORE",
            "state": "MD",
            "postal_code": "212011544",
            "telephone_number": "800-492-5538"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "HAMMACK",
        "first_name": "JOY",
        "middle_name": "A",
        "name_prefix": "Mrs.",
        "credential": "CRNA",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2012-12-17",
        "last_updated": "2024-10-16",
        "certification_date": "2024-10-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "367500000X",
            "taxonomy_group": "",
            "desc": "Nurse Anesthetist, Certified Registered",
            "state": "MD",
            "license": "91236",
            "primary": true
        },
        {
            "code": "163W00000X",
            "taxonomy_group": "",
            "desc": "Registered Nurse",
            "state": "MD",
            "license": "R177586",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Baltimore, MD

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 16, 2024; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
  • Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
  • 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.