DR. MARK HARRIS MELLOW M.D. NPI 1366426298

NPI Information

  • NPI: 1366426298
  • Provider Name: DR. MARK HARRIS MELLOW, M.D.
  • Classification: Internal Medicine - 207RG0100X
  • Specialization: Gastroenterology
  • Entity Type: Individual
  • Address: 3366 NW EXPRESSWAY ST
    650
    OKLAHOMA CITY, OK
    ZIP 73112
  • Phone: (405) 713-4430

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NPI Details

DR. Mark Harris Mellow, M.D. is a gastroenterology internal medicine in Oklahoma City, OK. The provider is 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. DR. Mark Harris Mellow, M.D. NPI is 1366426298. The provider is registered as an individual entity type.

The NPPES NPI record indicates the provider is a male.

The provider's business location address is:

3366 NW EXPRESSWAY ST
650
OKLAHOMA CITY, OK
ZIP 73112-462
Phone: (405) 713-4430
Fax: (405) 713-4429

The enumeration date for this NPI number is 12/5/2005 and was last updated on 4/2/2014.

Taxonomy Codes

The NPI record includes the healthcare provider taxonomy classification, state license number and state of licensure. The following information regarding the scope of practice of this provider is available:

No. Taxonomy Code Taxonomy Clasification Taxonomy Specialization License Number License State Primary
1207RG0100XInternal MedicineGastroenterology36011MASSACHUSETTSNo
2207RG0100XInternal MedicineGastroenterology108354NEW YORKNo
3207RG0100XInternal MedicineGastroenterology14105OKLAHOMAYes

Other Identifiers

The following information regarding additional identifiers associated to this NPI record includes the other identifier number, identifier type, identifier state and issuer.

No. Other Provider Identifier Other Provider Identifier Type Other Provider Identifier State Other Provider Identifier Issuer
1D35033MEDICARE UPIN
2100019460AMEDICAIDOKLAHOMA

What is NPI?

NPI stands for National Provider Identifier. The NPI is a 10-digit identification number that is completely unique. The NPI number by itself does not contain any identifiable information such as a provider’s speciality or location. The NPI is assigned to individuals or organizacions for their lifespan and it is independent of key provider information type updates like a change of practices, location or speciality.

This page was last updated on: 11/21/2025

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