NPIMap

Individual provider Active NPI

John Bak, CRNP

  • Nurse Practitioner
  • Danville, PA
National Provider Identifier
1235770702
Registry record updated Feb 3, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Nurse PractitionerTaxonomy code 363L00000X
License
SP020925 Issued in PA
Practice address
100 N Academy Ave
Danville, PA 17822-2695
Phone
(570) 271-6523
Fax
(570) 271-8056
NPI assigned
Oct 4, 2019
Last updated
Feb 3, 2026By the provider in NPPES
Sex
Male
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Feb 3, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Nurse Practitioner 363L00000X SP020925 PA Primary
Critical Care Medicine Nurse Practitioner 363LC0200X SP020925 PA

Addresses

Primary practice location

100 N Academy Ave
Danville, PA 17822-2695

Mailing address

100 N Academy Ave
Danville, PA 17822-4903
Phone (570) 271-6144

Other practice location 1

3 Hospital Dr Ste 206
Lewisburg, PA 17837-9394
Phone (570) 524-4141

Electronic endpoints 1

TypeEndpointUseAffiliation
Direct Messaging Address upmchospitals@upmcdirect.com UPMC

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Enrolled in PA
Eligible to order & refer
  • Part B services
  • Medical equipment
  • Home health
  • Power mobility devices
  • Hospice
Green means eligible to order or refer.

Enrollment records 1

Enrollment IDStateProvider typePAC IDDetails
I20191218002016 PA Practitioner - Nurse Practitioner 6608200050 Reassigns benefits to 4 organizations

Care Compare profile

Medicare Care Compare
Specialty
Nurse Practitioner
Education
Other, 2019
Medicare assignment
Accepts the Medicare-approved amount as payment in full
Telehealth
Offers telehealth services
Group practices
Geisinger ClinicGroup PAC ID 5395657001, 3,432 clinicians
Geisinger-HM Joint Venture LLCGroup PAC ID 1355676370, 426 clinicians

Practice addresses (Care Compare)

1 Hospital Dr
Lewisburg, PA 17837-9350
Phone (570) 522-2641

100 N Academy Ave
Danville, PA 17822-9800
Phone (570) 271-6211

255 Route 220 Hwy
Muncy, PA 17756-7569
Phone (570) 308-2600

Hospital & facility affiliations

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Enrolled
Credentials
Nurse Practitioner

State licenses

LicenseStateTypeSpecialty
SP020925PAMDNurse Practitioner

Practice roles

OrganizationSpecialtyStatusNew patients
Geisinger-HM Joint Venture, LLC Nurse Practitioner CurrentSince Mar 20, 2023 Accepting new patients
Evangelical Medical Services Organization CurrentSince Dec 20, 2023 Accepting new patients
Wellspan Medical Group CurrentSince Dec 1, 2025 Accepting new patients
Geisinger Clinic CurrentSince Mar 20, 2023 Accepting new patients
Geisinger-HM Joint Venture, LLC Nurse Practitioner Current Accepting new patients
Evangelical Medical Services Organization Current Accepting new patients
Geisinger Clinic Nurse Practitioner Current Accepting new patients
Geisinger Clinic CurrentSince Mar 20, 2023 Accepting new patients
Wellspan Medical Group Current Accepting new patients
Geisinger-HM Joint Venture, LLC Nurse Practitioner CurrentSince Mar 20, 2023 Accepting new patients
Wellspan Medical Group CurrentSince Dec 1, 2025 Accepting new patients
Evangelical Medical Services Organization CurrentSince Dec 20, 2023 Accepting new patients
Geisinger Clinic Past Accepting new patients

Locations

100 N Academy Ave
Danville, PA 17822

1 Hospital Dr
Lewisburg, PA 17837
Phone (570) 522-2000

25 Lystra Rogers Dr
Lewisburg, PA 17837
Phone (570) 523-3290

3 Hospital Dr
Ste 206
Lewisburg, PA 17837
Phone (570) 522-9771

3 Hospital Dr
Ste 318
Lewisburg, PA 17837
Phone (570) 522-1007

10 Choate Cir
Montoursville, PA 17754
Phone (570) 368-5566

255 Route 220 Hwy
Muncy, PA 17756
Phone (570) 308-2600

1600 S George St
York, PA 17403
Phone (717) 848-3615

25 Monument Rd
Ste 270
York, PA 17403
Phone (717) 741-8250

Interoperability endpoints

  • Direct secure messaging: jbak562838@direct.geisinger.edu

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 29

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

View all 29

NPI Registry JSON

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

{
    "created_epoch": "1570147200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1770076800000",
    "number": "1235770702",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "100 N ACADEMY AVE",
            "city": "DANVILLE",
            "state": "PA",
            "postal_code": "178224903",
            "telephone_number": "570-271-6144"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "100 N ACADEMY AVE",
            "city": "DANVILLE",
            "state": "PA",
            "postal_code": "178222695",
            "telephone_number": "570-271-6523",
            "fax_number": "570-271-8056"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3 Hospital Dr Ste 206",
            "address_purpose": "LOCATION",
            "city": "Lewisburg",
            "state": "PA",
            "postal_code": "178379394",
            "country_code": "US",
            "telephone_number": "570-524-4141",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "BAK",
        "first_name": "JOHN",
        "credential": "CRNP",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-10-04",
        "last_updated": "2026-02-03",
        "certification_date": "2026-02-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "363L00000X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner",
            "state": "PA",
            "license": "SP020925",
            "primary": true
        },
        {
            "code": "363LC0200X",
            "taxonomy_group": "",
            "desc": "Nurse Practitioner, Critical Care Medicine",
            "state": "PA",
            "license": "SP020925",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "upmchospitals@upmcdirect.com",
            "affiliation": "Y",
            "affiliationName": "UPMC",
            "address_1": "600 Grant St",
            "address_2": "Floor 58",
            "city": "Pittsburgh",
            "state": "PA",
            "country_code": "US",
            "postal_code": "152192702",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

Other providers in Danville, PA

Sources for this page

Verify at the official NPI Registry.