JENNIFER PATRICIA-REASON MARK DO
NPI 1376706713
Obstetrics & Gynecology in Olean, NY
About Jennifer Patricia-reason Mark Do NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
JENNIFER PATRICIA-REASON MARK DO (NPI 1376706713) is an individual obstetrics & gynecology provider in Olean, New York, licensed in New York (309168) and active in the NPI registry since July 2008. She is enrolled in Medicare PECOS, is affiliated with Olean General Hospital, and is a graduate of Nova Southeastern College Of Osteo Medicine (2008).
NPPES Registry Identity
Specialties & Licenses
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
Jennifer Patricia-reason Mark Do 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
8Medicare enrollment records show Jennifer Mark reassigns Medicare billing to 8 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Olean, NY 14760
- Reassigned Medicare billing, New York enrollment
- 33 clinicians in this Medicare group
Buffalo, NY 14220
- Reassigned Medicare billing, New York enrollment
- 499 clinicians in this Medicare group
Cheektowaga, NY 14225
- Reassigned Medicare billing, New York enrollment
- 515 clinicians in this Medicare group
Philipsburg, PA 16866
- Reassigned Medicare billing, Pennsylvania enrollment
- 4,429 clinicians in this Medicare group
Johnson City, NY 13790
- Reassigned Medicare billing, New York enrollment
- 854 clinicians in this Medicare group
Niskayuna, NY 12309
- Reassigned Medicare billing, New York enrollment
- Medicare enrollment name: Obgyn Hospitalist Medical Services Of New York PC
- 125 clinicians in this Medicare group
Greenville, SC 29607
- Reassigned Medicare billing, Pennsylvania enrollment
- 58 clinicians in this Medicare group
Steamboat Springs, CO 80487
- Reassigned Medicare billing, Colorado enrollment
- 181 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.
Hospital Affiliations CMS Care Compare
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Olean General Hospital
Acute Care Hospitals · Olean, NYPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 14760 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.
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 Jennifer Mark's NPI number?
The NPI number for Jennifer Mark is 1376706713. It was assigned to this individual provider in the NPPES registry on July 7, 2008.
Where is Jennifer Mark located?
Jennifer Mark practices at 135 N Union St, Olean, NY 14760. The listed phone number is (716) 375-7500.
What is Jennifer Mark's specialty?
The primary specialty registered for this NPI is Obstetrics & Gynecology with taxonomy code 207V00000X.
Is Jennifer Mark enrolled in Medicare?
Yes. Jennifer Mark 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 Jennifer Mark's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Jennifer Mark reassigns Medicare benefits to 8 organizations: Southern Tier Community Health Center Network, Inc. (Olean, NY), Mercy Hospital Of Buffalo (Buffalo, NY), Sisters Of Charity Hospital Of Buffalo New York (Cheektowaga, NY), Geisinger Clinic (Philipsburg, PA), United Health Services Hospitals, Inc. (Johnson City, NY) and 3 more organizations, listed in the Medicare section above. 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 Jennifer Mark's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
What insurance does Jennifer Mark accept?
Health plans from Ambetter Health, Ambetter Health of Delaware, Ambetter from Buckeye Health Plan, Oscar Health and Oscar Insurance Company and 1 other insurer list Jennifer Mark 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 Jennifer Mark affiliated with any hospitals?
According to CMS data, Jennifer Mark is affiliated with Olean General Hospital.
When was this NPI record last updated?
The NPPES record for Jennifer Mark was last updated on February 19, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 20 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.
# Jennifer Patricia-Reason Mark, DO · NPI 1376706713
Obstetrics & Gynecology physician in Olean, New York. Individual provider, active in the CMS NPPES registry since July 7, 2008.
## Identity
- **NPI:** 1376706713 (Entity type: Individual)
- **Enumerated:** July 7, 2008
- **Primary specialty:** Obstetrics & Gynecology · taxonomy 207V00000X
- **State license:** 309168 (New York)
- **Sole proprietor:** No
## Practice location
- **Address:** 135 N UNION ST, Olean, NY 14760-2736
- **Phone:** (716) 375-7500
## 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:** 8 organizations under Medicare reassignment (form CMS-855R): Southern Tier Community Health Center Network, Inc. (NPI 1184654477, Olean, NY); Mercy Hospital Of Buffalo (NPI 1144262908, Buffalo, NY); Sisters Of Charity Hospital Of Buffalo New York (NPI 1043455199, Cheektowaga, NY); Geisinger Clinic (NPI 1811948367, Philipsburg, PA); United Health Services Hospitals, Inc. (NPI 1962463851, Johnson City, NY); and 3 more · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** Nova Southeastern College Of Osteo Medicine, class of 2008
## Record status
- **NPPES last updated:** February 19, 2025
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Source: [NPI Profile](https://npiprofile.com/npi/1376706713) · Data from the CMS NPPES public registry.