Giles Thomas Knowles
Pediatrics Physician · Phoenix, AZ
Giles Thomas Knowles is a pediatrics physician with a practice address in Phoenix, Arizona, and NPI 1104453968, issued on Mar 23, 2020. Check the license (Arizona 010984, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Giles Thomas Knowles
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- 010984 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 1919 E Thomas RD, Phoenix, AZ 85016
- Phone
- (602) 933-1000
- Enumerated
- Mar 23, 2020
- Record last updated
- Dec 16, 2024
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 1,309 in Arizona → Look up another NPI →
Also registered at 1919 E Thomas RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Asmaa Aamir, M.D.Diagnostic Radiology Physician1912163791
- Madeline Aaron, APRN-RNPPediatric Nurse Practitioner1851134837
- Brandon Abbott, D.O., M.P.H.Hospitalist Physician1528350139
- Jason AbbottStudent in an Organized Health Care Education/Training Program1184257958
- Monica Abd El Nour, MDPediatric Infectious Diseases Physician1760044101
- Lindsay Abel, DOStudent in an Organized Health Care Education/Training Program1750222055
Verify Giles Thomas Knowles in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 010984Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
58% fewer Medicare Part D claims than the average pediatrics physician in 2024
156 Medicare Part D claims for 24 beneficiaries, against an average of 375 among the 5,609 providers of this specialty who prescribed in Part D.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Giles Thomas Knowles among 1,309 pediatrics physician records in Arizona
Giles Thomas Knowles is one of 1,309 pediatrics physician records with a practice address in Arizona. 41% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2020, is newer than 87% of them.
- NPI issued2020 · 87% of these records are older, 10% newer
- In a Medicare fileYes · 41% of these records are
- In the CMS Doctors and Clinicians fileNo · 8% of these records are
- Record last updated2024 · 54% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
422 pediatrics physician records list a practice address in Phoenix
They are 422 of the 31,399 NPPES records with a practice address in Phoenix, and 1,309 pediatrics physician records in Arizona.
All 1,309 in Arizona → Every provider in Phoenix → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Paul Allen, M.D.Phoenix, AZ 850161437134681
- Grace Caputo, M.D.Phoenix, AZ 850161518920958
- Anastasia GentlesPhoenix, AZ 850161356343875
- William Haug, M.D.Phoenix, AZ 850161235115908
- Donna Holland, M.D.Phoenix, AZ 850161447210307
- Michelle Huddleston, MDPhoenix, AZ 850161164484200
- Hung Le, MDPhoenix, AZ 850161154313823
- Barbara Lednicky, MDPhoenix, AZ 850161356321962
Common questions
What is Giles Thomas Knowles's NPI number?
Giles Thomas Knowles's National Provider Identifier (NPI) is 1104453968, issued on Mar 23, 2020. An NPI identifies a provider in billing; it is not a license.
Where is Giles Thomas Knowles located?
The NPPES record lists a practice address at 1919 E Thomas RD, Phoenix, AZ, 85016. Phone: (602) 933-1000. Providers update this record themselves, so call before visiting.
How can I verify Giles Thomas Knowles's license?
NPPES lists Arizona license number 010984, 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.
How much does Giles Thomas Knowles prescribe under Medicare Part D?
In 2024, Giles Thomas Knowles had 156 Medicare Part D claims for 24 beneficiaries; the average among pediatrics physician prescribers was 375. Part D covers Medicare prescriptions only.
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.