Gerald L. Oldham, MD
Internal Medicine Physician · Peoria, AZ
Gerald L. Oldham, MD is an internal medicine physician with a practice address in Peoria, Arizona, and NPI 1235176207, issued on May 31, 2006. Check the license (Arizona 10076, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Gerald L. Oldham
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 10076 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 13640 N Plaza Del Rio Blvd, Peoria, AZ 85381
- Phone
- (623) 876-3850
- Enumerated
- May 31, 2006
- Record last updated
- Jan 24, 2008 (not updated in 18 years: call before relying on the address or phone)
- Fax
- (623) 876-3809
- Medicaid ID
- 267642 AZ
- Medicare enrollment
- Enrolled (PECOS I20060310000014); accepts Medicare assignment
- Medical or professional school
- University Of Arkansas College Of Medicine, 1976
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,853 in Arizona → Look up another NPI →
Also registered at 13640 N Plaza Del Rio Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Israa Al-Sayyed, PA-CPhysician Assistant1790236487
- Melinda Alba, M.D., M.S.Family Medicine Physician1841467263
- Martha Alemayehu, D.O.Family Medicine Physician1922459700
- Sekar Annamalai, MDInternal Medicine Physician1851345334
- Alison Aveson, PMHNP-BCNurse Practitioner1497326193
- Gera Barnard, MSN, FNP-CFamily Nurse Practitioner1124315510
Verify Gerald L. Oldham in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 10076Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
3.3 times the Medicare Part D claims of the average internal medicine physician in 2024
10,486 Medicare Part D claims for 1,106 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 8% of claims. 296 claims were for opioids.
Most prescribed
- Levothyroxine Sodium554 claims
- Atorvastatin Calcium543 claims
- Amlodipine Besylate488 claims
- Losartan Potassium378 claims
- Lisinopril346 claims
- Simvastatin336 claims
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.
Bills Medicare through one group practice
- Banner Primary Care Physicians Arizona LLCPeoria, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Gerald L. Oldham among 2,853 internal medicine physician records in Arizona
Gerald L. Oldham, MD is one of 2,853 internal medicine physician records with a practice address in Arizona. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 13% of them.
- NPI issued2006 · 13% of these records are older, 55% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated1976 · median 2003 among the 1,643 with a school on file
- Record last updated2008 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
58 internal medicine physician records list a practice address in Peoria
They are 58 of the 2,528 NPPES records with a practice address in Peoria, and 2,853 internal medicine physician records in Arizona.
All 2,853 in Arizona → Every provider in Peoria → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Ruben Aguilera, MDPeoria, AZ 853811568463792
- Sekar Annamalai, MDPeoria, AZ 853811851345334
- Avtar Bassin, MDPeoria, AZ 853811013998335
- David Engel, MDPeoria, AZ 853811538106570
- John Kieley, MDPeoria, AZ 853811649279654
- Gary Mort, DOPeoria, AZ 853811477554608
- Kulbhushan Paul, MDPeoria, AZ 853811376532127
- L Pettersson, MDPeoria, AZ 853811205880861
Common questions
What is Gerald L. Oldham, MD's NPI number?
Gerald L. Oldham, MD's National Provider Identifier (NPI) is 1235176207, issued on May 31, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Gerald L. Oldham, MD located?
The NPPES record lists a practice address at 13640 N Plaza Del Rio Blvd, Peoria, AZ, 85381. Phone: (623) 876-3850. Providers update this record themselves, so call before visiting.
How can I verify Gerald L. Oldham, MD's license?
NPPES lists Arizona license number 10076, 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 Gerald L. Oldham, MD prescribe under Medicare Part D?
In 2024, Gerald L. Oldham, MD had 10,486 Medicare Part D claims for 1,106 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.