Gregory Parker, M.D.
NPI 1972544625 · Hematology & Oncology Physician · Oklahoma City, OK
Enrolled with Medicare as Practitioner - Medical Oncology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Gregory Parker, M.D. is a Hematology & Oncology Physician provider in Oklahoma City, OK (NPI 1972544625).
Provider details
- NPI number
- 1972544625
- Entity type
- Individual
- Primary specialty
- Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 14781 (OK)
Specialties & taxonomies
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
- 2006-06-10
- Last updated
- 2014-05-12
Frequently asked questions
- What is Gregory Parker's NPI number?
- Gregory Parker's National Provider Identifier (NPI) is 1972544625, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Gregory Parker's specialty?
- Gregory Parker is listed in the NPPES registry with a primary specialty of Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Gregory Parker located?
- Gregory Parker's practice location on file with NPPES is 3525 Nw 56th St, Oklahoma City, OK 73112-4550.
- What is Gregory Parker's phone number?
- The practice phone number listed in the NPPES registry for Gregory Parker is (405) 942-9200.
- Does Gregory Parker accept Medicare?
- Gregory Parker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Gregory Parker's NPI active?
- Yes — Gregory Parker's NPI (1972544625) is active in the NPPES registry as of the last update on 2014-05-12.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.