1. Home
  2. Directory
  3. California
  4. Sacramento
  5. Student In An Organized Health Care Education Training Program
  6. NPI Profile

JOHN ROBERT MARK MD
NPI 1720692775
Student in an Organized Health Care Education/Training Program in Sacramento, CA

Active since September 06, 2020PECOS Enrolled
4860 Y ST STE 2400, SACRAMENTO, CA 95817(916) 734-6602 Get Directions Write a Review

NPPES record last updated: April 1, 2022. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About John Robert Mark Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

JOHN ROBERT MARK MD (NPI 1720692775) is an individual student in an organized health care education/training program in Sacramento, California and active in the NPI registry since September 2020. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1720692775
Entity TypeIndividualMale
Primary Taxonomy390200000X
Provider Legal NameJOHN ROBERT MARKCredential: MD
Location Address4860 Y ST STE 2400Sacramento, CA 95817-2307
Mailing Address4860 Y St Ste 2400Sacramento, CA 95817-2307 · (916) 734-6602
Phone(916) 734-6602
Sole ProprietorNo
Enumeration DateSeptember 6, 2020
Last NPPES UpdateApril 1, 2022
NPPES CertifiedApril 1, 2022
✔ NPI 1720692775 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyStudent in an Organized Health Care Education/Training ProgramStudent, Health Care
Taxonomy Code390200000X
Definition
An individual who is enrolled in an organized health care education/training program leading to a degree, certification, registration, and/or licensure to provide health care.
4860 Y ST STE 2400, Sacramento, CA 95817
Open in Google Maps ↗

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Cigna Healthcare.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

John Robert Mark Md is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show John Mark reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Duke Health Integrated Practice, Inc.
2,238 mi
Family Medicine
131 MEDICAL PARK RD STE 302
Mooresville, NC 28117
  • Reassigned Medicare billing, North Carolina enrollment
  • 3,671 clinicians in this Medicare group
NPI 1760288633 (704) 660-4750

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

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.

DR. JEFFREY RYUTA WILLIS M.D., PHD
Student in an Organized Health Care Education/Training Program
4860 Y ST STE 2400
SACRAMENTO, CA 95817
Sacramento County (916) 734-6602
ANDREW XIE CHEN
Radiology (Diagnostic Radiology)
4860 Y ST STE 2400
SACRAMENTO, CA 95817
Sacramento County (916) 734-6602
MICHAEL NGUYEN MD
Student in an Organized Health Care Education/Training Program
4860 Y ST STE 2400
SACRAMENTO, CA 95817
Sacramento County (916) 734-6602
CLAYTON GRUNDVIG MD
Student in an Organized Health Care Education/Training Program
4860 Y ST STE 2400
SACRAMENTO, CA 95817
Sacramento County (916) 734-6602
JONATHAN HERNANDEZ
Ophthalmology
4860 Y ST STE 2400
SACRAMENTO, CA 95817
Sacramento County (916) 734-6602
ALEXANDER RUSAKEVICH DO
Student in an Organized Health Care Education/Training Program
4860 Y ST STE 2400
SACRAMENTO, CA 95817
Sacramento County (916) 734-6602
DR. YIN LIU M.D., PH.D.
Ophthalmology (Neuro-ophthalmology)
4860 Y ST STE 2400
SACRAMENTO, CA 95817
Sacramento County (916) 734-6891
CRISTY KU M.D., PH.D.
Ophthalmology
4860 Y ST STE 2400
SACRAMENTO, CA 95817
Sacramento County (503) 494-8386

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 Mark's NPI number?

The NPI number for John Mark is 1720692775. It was assigned to this individual provider in the NPPES registry on September 6, 2020.

Where is John Mark located?

John Mark practices at 4860 Y St Ste 2400, Sacramento, CA 95817. The listed phone number is (916) 734-6602.

What is John Mark's specialty?

The primary specialty registered for this NPI is Student in an Organized Health Care Education/Training Program with taxonomy code 390200000X.

Is John Mark enrolled in Medicare?

Yes. John Mark is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for John Mark's services?

According to the CMS Revalidation Reassignment List (October 2026 release), John Mark reassigns Medicare benefits to Duke Health Integrated Practice, Inc. (Mooresville, NC). The 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 Mark's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does John Mark accept?

Health plans from Cigna Healthcare list John 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.

When was this NPI record last updated?

The NPPES record for John Mark was last updated on April 1, 2022. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 4 years 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.