John Grizzle, M.D.
NPI 1255396073 · Family Medicine Physician · Oklahoma City, OK
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Grizzle, M.D. is a Family Medicine Physician provider in Oklahoma City, OK (NPI 1255396073).
Provider details
- NPI number
- 1255396073
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 20170 (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 tenure28% of score
20 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
993 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. 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.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 704 | $115 |
| Testing for Presence of Drug, Read By Direct Observation80305 | 274 | $12 |
| New Patient Office Or Other Outpatient Visit With a High Level of Medical Decision Making, If Using Time, 60 Minutes Or More99205 | 15 | $205 |
Typical Medicare-allowed amounts for these services range $12–$205 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 56 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Oxycodone Hcl | 879 | 80 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 725 | 80 |
| Oxycodone Hcl/Acetaminophenbrand: Oxycodone-Acetaminophen | 327 | 35 |
| Tizanidine Hcl | 177 | 32 |
| Alprazolam | 157 | 19 |
| Gabapentin | 146 | 36 |
| Pregabalin |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-18
- Last updated
- 2025-10-15
- Certified
- 2025-10-15
Frequently asked questions
- What is John Grizzle's NPI number?
- John Grizzle's National Provider Identifier (NPI) is 1255396073, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Grizzle's specialty?
- John Grizzle is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Grizzle located?
- John Grizzle's practice location on file with NPPES is 15800 S Western Ave, Oklahoma City, OK 73170-9393.
- What is John Grizzle's phone number?
- The practice phone number listed in the NPPES registry for John Grizzle is (405) 793-1300.
- Does John Grizzle accept Medicare?
- John Grizzle is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Grizzle's NPI active?
- Yes — John Grizzle's NPI (1255396073) is active in the NPPES registry as of the last update on 2025-10-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.