William V. Irby, DO
Family Medicine Physician · Hamilton, MO
William V. Irby, DO is a family medicine physician with a practice address in Hamilton, Missouri, and NPI 1902874779, issued on Mar 9, 2006. Check the license (Missouri R3G66, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- William V. Irby
- Credential
- DO
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- R3G66 MO
Self-reported in NPPES; status is on the state search - Practice location
- 101 Cross St, Hamilton, MO 64644
- Phone
- (816) 583-2151
- Enumerated
- Mar 9, 2006
- Record last updated
- Mar 7, 2023
- Medicaid ID
- 242356400 MO
- Medicare enrollment
- Enrolled (PECOS I20090225000102); accepts Medicare assignment
- Medical or professional school
- R Franklin University Of Med & Sci/Chicago Medical School, 1984
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 2,991 in Missouri → Look up another NPI →
Also registered at 101 Cross St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- McKauley Prothero-WalserFamily Nurse Practitioner1740133966
Verify William V. Irby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMissouri Board of Registration for the Healing Arts
Search for license R3G66Check 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 family medicine physician in 2024
11,662 Medicare Part D claims for 659 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 1,369 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen701 claims
- Atorvastatin Calcium579 claims
- Levothyroxine Sodium486 claims
- Lisinopril418 claims
- Gabapentin306 claims
- Metformin Hcl269 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.
Industry payments in 2024: $1,040.42
61 payments; by number, the most common kind was food and beverage; the largest payer was Abbvie Inc. The 55,478 providers of this specialty with any payment received $902.55 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
- Northwest Health Services IncSaint Joseph, MO
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William V. Irby among 2,991 family medicine physician records in Missouri
William V. Irby, DO is one of 2,991 family medicine physician records with a practice address in Missouri. 79% 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, 52% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1984 · median 2006 among the 1,778 with a school on file
- Record last updated2023 · 53% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
3 family medicine physician records list a practice address in Hamilton
They are 3 of the 16 NPPES records with a practice address in Hamilton, and 2,991 family medicine physician records in Missouri.
All 2,991 in Missouri → Every provider in Hamilton → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Arihant Jain, M.D.Hamilton, MO 646441396910469
- Theodore Rights, MDHamilton, MO 646441255315289
- Karen Coleman, DOFarmington, MO 646401659463982
- Larry Dickinson, D.O.Gallatin, MO 646401972583094
- Terry Lienhop, DOJamesport, MO 646481194717223
- Zachery Mahler, MDGallatin, MO 646401831750785
- Andrew Horine, D.O.Carrollton, MO 646331720342629
- Donald Kampschmidt, M.D.Carrollton, MO 646331891801684
Common questions
What is William V. Irby, DO's NPI number?
William V. Irby, DO's National Provider Identifier (NPI) is 1902874779, issued on Mar 9, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William V. Irby, DO located?
The NPPES record lists a practice address at 101 Cross St, Hamilton, MO, 64644. Phone: (816) 583-2151. Providers update this record themselves, so call before visiting.
How can I verify William V. Irby, DO's license?
NPPES lists Missouri license number R3G66, as entered by the provider. Search the Missouri Board of Registration for the Healing Arts at https://www.fsmb.org/contact-a-state-medical-board/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William V. Irby, DO prescribe under Medicare Part D?
In 2024, William V. Irby, DO had 11,662 Medicare Part D claims for 659 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.