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DR. MARK HARRIS MELLOW M.D.
NPI 1366426298
Internal Medicine - Gastroenterology in Oklahoma City, OK

Active since December 05, 2005
3366 NW EXPRESSWAY ST, 650, OKLAHOMA CITY, OK 73112(405) 713-4430(405) 713-4429 Get Directions Write a Review

NPPES record last updated: April 2, 2014. Verified against the NPPES registry weekly; last sync: August 02, 2026.

About Dr. Mark Harris Mellow M.d. NPPES

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

DR. MARK HARRIS MELLOW M.D. (NPI 1366426298) is an individual gastroenterology provider in Oklahoma City, Oklahoma, licensed in Oklahoma (14105) and active in the NPI registry since December 2005.

NPPES Registry Identity

NPI1366426298
Entity TypeIndividualMale
Primary Taxonomy207RG0100X
Provider Legal NameDR. MARK HARRIS MELLOWCredential: M.D.
Location Address3366 NW EXPRESSWAY ST, 650Oklahoma City, OK 73112-4462
Mailing Address5300 N Independence Ave, Suite 280Oklahoma City, OK 73112-5556 · (405) 713-4430 · Fax (405) 713-4429
Phone(405) 713-4430
Fax(405) 713-4429
Sole ProprietorNo
Enumeration DateDecember 5, 2005
Last NPPES UpdateApril 2, 2014
✔ NPI 1366426298 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyInternal Medicine · GastroenterologyAllopathic & Osteopathic Physicians
Taxonomy Code207RG0100X
Licenses✔ Licensed in OK · 14105✔ Licensed in MA · 36011✔ Licensed in NY · 108354
Definition
An internist who specializes in diagnosis and treatment of diseases of the digestive organs including the stomach, bowels, liver and gallbladder. This specialist treats conditions such as abdominal pain, ulcers, diarrhea, cancer and jaundice and performs complex diagnostic and therapeutic procedures using endoscopes to visualize internal organs.
3366 NW EXPRESSWAY ST, Oklahoma City, OK 73112
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Other Identifiers 2

Medicare UPIND35033
Medicaid100019460AOK

Other Providers at the Same Location NPPES 9

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

ANUPA KHASTGIR MD PC
Internal Medicine (Nephrology)
3366 NW EXPRESSWAY ST, SUITE 208
OKLAHOMA CITY, OK 73112
Oklahoma County (405) 942-0794
TERRANCE KHASTGIR MD PC
Internal Medicine (Cardiovascular Disease)
3366 NW EXPRESSWAY ST, SUITE 280
OKLAHOMA CITY, OK 73112
Oklahoma County (405) 373-4340
DENNIS M PARKER MD INC
Specialist
3366 NW EXPRESSWAY ST, STE 660
OKLAHOMA CITY, OK 73112
Oklahoma County (405) 947-3345
DR. SANTIAGO REYES MD
Pediatrics (Pediatric Pulmonology)
3366 NW EXPRESSWAY ST, SUITE 330
OKLAHOMA CITY, OK 73112
Oklahoma County (405) 945-4495
NANCY N NAGLE MD PC
Specialist
3366 NW EXPRESSWAY ST, SUITE 660
OKLAHOMA CITY, OK 73112
Oklahoma County (405) 947-3345
NANCY SATZLER MD PC
Medical Genetics, Ph.D. Medical Genetics
3366 NW EXPRESSWAY ST, SUITE 280
OKLAHOMA CITY, OK 73112
Oklahoma County (405) 945-0376
KIDNEY SPECIALISTS OF CENTRAL OKLAHOMA, PC
Internal Medicine (Nephrology)
3366 NW EXPRESSWAY ST, SUITE 550
OKLAHOMA CITY, OK 73112
Oklahoma County (405) 942-5442
MARK S. SULLIVAN, M.D., PLLC
Specialist
3366 NW EXPRESSWAY ST, SUITE 720
OKLAHOMA CITY, OK 73112
Oklahoma County (405) 947-0676

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 Mark Mellow's NPI number?

The NPI number for Mark Mellow is 1366426298. It was assigned to this individual provider in the NPPES registry on December 5, 2005.

Where is Mark Mellow located?

Mark Mellow practices at 3366 NW Expressway St 650, Oklahoma City, OK 73112. The listed phone number is (405) 713-4430.

What is Mark Mellow's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Gastroenterology, with taxonomy code 207RG0100X.

When was this NPI record last updated?

The NPPES record for Mark Mellow was last updated on April 2, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 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.