Mark Mellow, M.D.
NPI 1366426298 · Gastroenterology Physician · Oklahoma City, OK
Mark Mellow, M.D. is a Gastroenterology Physician provider in Oklahoma City, OK (NPI 1366426298).
Provider details
- NPI number
- 1366426298
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 14105 (OK)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-05
- Last updated
- 2014-04-02
Frequently asked questions
- What is Mark Mellow's NPI number?
- Mark Mellow's National Provider Identifier (NPI) is 1366426298, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Mellow's specialty?
- Mark Mellow is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Mellow located?
- Mark Mellow's practice location on file with NPPES is 3366 Nw Expressway St, Oklahoma City, OK 73112-4462.
- What is Mark Mellow's phone number?
- The practice phone number listed in the NPPES registry for Mark Mellow is (405) 713-4430.
- Is Mark Mellow's NPI active?
- Yes — Mark Mellow's NPI (1366426298) is active in the NPPES registry as of the last update on 2014-04-02.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.