Garret Rex Grizzle, D.O.
Anesthesiology Physician · Phoenix, AZ
Garret Rex Grizzle, D.O. is an anesthesiology physician with a practice address in Phoenix, Arizona, and NPI 1316324643, issued on May 6, 2015. Check the license (Arizona 007923, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Garret Rex Grizzle
- Credential
- D.O.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 007923 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 645 E Missouri Ave Ste 300, Phoenix, AZ 85012
- Phone
- (602) 528-6960
- Enumerated
- May 6, 2015
- Record last updated
- Jun 15, 2022
- Medicare enrollment
- Enrolled (PECOS I20190731003934); accepts Medicare assignment
- Medical or professional school
- West Virginia School Of Osteopathic Medicine, 2015
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 1,473 in Arizona → Look up another NPI →
Also registered at 645 E Missouri Ave Ste 300
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Brittany Aeschlimann, M.D.Pain Medicine (Anesthesiology) Physician1144682659
- Amalia Aleck, M.D.Anesthesiology Physician1467763284
- Jeanmarie Altieri, CRNACertified Registered Nurse Anesthetist1033214408
- Sean Barney, PA-CPhysician Assistant1629304332
- Carly Bass, RNRegistered Nurse1144749946
- Nicholas Baumler, D.O.Anesthesiology Physician1659542660
Verify Garret Rex Grizzle in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 007923Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 79.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $14.86
1 payment: food and beverage; the largest payer was Chiesi USA, Inc. The 17,774 providers of this specialty with any payment received $669.59 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Valley Anesthesiology Consultants IncMesa, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Garret Rex Grizzle among 1,473 anesthesiology physician records in Arizona
Garret Rex Grizzle, D.O. is one of 1,473 anesthesiology physician records with a practice address in Arizona. 73% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2015, is newer than 81% of them.
- NPI issued2015 · 81% of these records are older, 17% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated2015 · median 2003 among the 984 with a school on file
- Record last updated2022 · 60% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207L00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
602 anesthesiology physician records list a practice address in Phoenix
They are 602 of the 31,399 NPPES records with a practice address in Phoenix, and 1,473 anesthesiology physician records in Arizona.
All 1,473 in Arizona → Every provider in Phoenix → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Joshua Bloomstone, MDPhoenix, AZ 850121003886292
- Dennis Brydon, MDPhoenix, AZ 850121114907821
- David Domin, MDPhoenix, AZ 850121982675062
- Russell Duquette, MDPhoenix, AZ 850121538139258
- Harold Emershad, MDPhoenix, AZ 850121326018516
- Karl Frindrich, MDPhoenix, AZ 850121407823347
- Tania Haddad, MD DMDPhoenix, AZ 850121235101262
- Jeffrey Morray, MDPhoenix, AZ 850121003896713
Common questions
What is Garret Rex Grizzle, D.O.'s NPI number?
Garret Rex Grizzle, D.O.'s National Provider Identifier (NPI) is 1316324643, issued on May 6, 2015. An NPI identifies a provider in billing; it is not a license.
Where is Garret Rex Grizzle, D.O. located?
The NPPES record lists a practice address at 645 E Missouri Ave Ste 300, Phoenix, AZ, 85012. Phone: (602) 528-6960. Providers update this record themselves, so call before visiting.
How can I verify Garret Rex Grizzle, D.O.'s license?
NPPES lists Arizona license number 007923, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
What is Garret Rex Grizzle, D.O.'s MIPS final score?
The 2023 MIPS final score is 79.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.