Garret Grizzle, D.O.
NPI 1316324643 · Anesthesiology Physician · Phoenix, AZ
Enrolled with Medicare as Practitioner - Anesthesiology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Garret Grizzle, D.O. is a Anesthesiology Physician provider in Phoenix, AZ (NPI 1316324643).
Provider details
- NPI number
- 1316324643
- Entity type
- Individual
- Primary specialty
- Anesthesiology PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Male
- Sole proprietor
- No
- License
- 007923 (AZ)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
11 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
59 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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) |
|---|---|---|
| Anesthesia for Other Procedure on Large Bowel Using an Endoscope00811 | 21 | $120 |
| Anesthesia for Other Procedure on Esophagus, Stomach, Or Upper Small Bowel Using an Endoscope00731 | 15 | $131 |
| Anesthesia for Procedure to Assess Heart Electrical Activity00537 | 12 | $452 |
| Anesthesia for X-Ray Or Radiation Therapy01922 | 11 | $198 |
Typical Medicare-allowed amounts for these services range $120–$452 (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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$15 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2015-05-06
- Last updated
- 2022-06-15
- Certified
- 2022-06-15
Frequently asked questions
- What is Garret Grizzle's NPI number?
- Garret Grizzle's National Provider Identifier (NPI) is 1316324643, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Garret Grizzle's specialty?
- Garret Grizzle is listed in the NPPES registry with a primary specialty of Anesthesiology Physician (Allopathic & Osteopathic Physicians).
- Where is Garret Grizzle located?
- Garret Grizzle's practice location on file with NPPES is 645 E Missouri Ave Ste 300, Phoenix, AZ 85012-1351.
- What is Garret Grizzle's phone number?
- The practice phone number listed in the NPPES registry for Garret Grizzle is (602) 528-6960.
- Does Garret Grizzle accept Medicare?
- Garret Grizzle is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Garret Grizzle's NPI active?
- Yes — Garret Grizzle's NPI (1316324643) is active in the NPPES registry as of the last update on 2022-06-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.