JOHN BAK CRNP
NPI 1235770702
Nurse Practitioner in Danville, PA
About John Bak Crnp NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JOHN BAK CRNP (NPI 1235770702) is an individual nurse practitioner in Danville, Pennsylvania, licensed in Pennsylvania (SP020925) and active in the NPI registry since October 2019. He is enrolled in Medicare PECOS, is affiliated with Geisinger-bloomsburg Hospital, and maintains a secondary practice location in Lewisburg.
NPPES Registry Identity
Specialties & Licenses 2
Secondary Practice Location 1
Accepted Insurance
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
John Bak Crnp is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
4Medicare enrollment records show John Bak reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Danville, PA 17822
- Reassigned Medicare billing, Pennsylvania enrollment
- 4,429 clinicians in this Medicare group
Northumberland, PA 17857
- Reassigned Medicare billing, Pennsylvania enrollment
- 3,080 clinicians in this Medicare group
Lewisburg, PA 17837
- Reassigned Medicare billing, Pennsylvania enrollment
- 303 clinicians in this Medicare group
Muncy, PA 17756
- Reassigned Medicare billing, Pennsylvania enrollment
- 1,405 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 7
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 3
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Geisinger-Bloomsburg Hospital
Acute Care Hospitals · Bloomsburg, PAGeisinger Medical Center
Acute Care Hospitals · Danville, PAEvangelical Community Hospital
Acute Care Hospitals · Lewisburg, PAPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 17822 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
DANVILLE, PA 17822
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is John Bak's NPI number?
The NPI number for John Bak is 1235770702. It was assigned to this individual provider in the NPPES registry on October 4, 2019.
Where is John Bak located?
John Bak practices at 100 N Academy Ave, Danville, PA 17822. The listed phone number is (570) 271-6523.
What is John Bak's specialty?
The primary specialty registered for this NPI is Nurse Practitioner with taxonomy code 363L00000X.
Is John Bak enrolled in Medicare?
Yes. John Bak is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for John Bak's services?
According to the CMS Revalidation Reassignment List (October 2026 release), John Bak reassigns Medicare benefits to 4 organizations: Geisinger Clinic (Danville, PA), Wellspan Medical Group (Northumberland, PA), Evangelical Medical Services Organization (Lewisburg, PA) and Geisinger-Hm Joint Venture LLC (Muncy, PA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for John Bak's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does John Bak accept?
Health plans from Oscar Health list John Bak as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.
Is John Bak affiliated with any hospitals?
According to CMS data, John Bak is affiliated with Geisinger-Bloomsburg Hospital, Geisinger Medical Center and Evangelical Community Hospital.
When was this NPI record last updated?
The NPPES record for John Bak was last updated on February 3, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# John Bak, CRNP · NPI 1235770702
Nurse Practitioner physician in Danville, Pennsylvania. Individual provider, active in the CMS NPPES registry since October 4, 2019.
## Identity
- **NPI:** 1235770702 (Entity type: Individual)
- **Enumerated:** October 4, 2019
- **Primary specialty:** Nurse Practitioner · taxonomy 363L00000X
- **State license:** SP020925 (Pennsylvania)
- **Sole proprietor:** No
## Practice location
- **Address:** 100 N ACADEMY AVE, Danville, PA 17822-2695
- **Phone:** (570) 271-6523 · **Fax:** (570) 271-8056
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 4 organizations under Medicare reassignment (form CMS-855R): Geisinger Clinic (NPI 1184675613, Danville, PA); Wellspan Medical Group (NPI 1871395749, Northumberland, PA); Evangelical Medical Services Organization (NPI 1942227632, Lewisburg, PA); Geisinger-Hm Joint Venture LLC (NPI 1952076119, Muncy, PA) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Other, class of 2019
## Record status
- **NPPES last updated:** February 3, 2026
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Source: [NPI Profile](https://npiprofile.com/npi/1235770702) · Data from the CMS NPPES public registry.