Gregory A. Doak, MD
Internal Medicine Physician · Sedalia, MO
Gregory A. Doak, MD is an internal medicine physician with a practice address in Sedalia, Missouri, and NPI 1588650741, issued on Sep 23, 2005. Check the license (Missouri R5C46, as entered in NPPES) on the Missouri Board of Registration for the Healing Arts; the Medicare figures below come from public CMS files.
- Name
- Gregory A. Doak
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- R5C46 MO
Self-reported in NPPES; status is on the state search - Practice location
- 3700 W 10TH St, Sedalia, MO 65301
- Phone
- (660) 827-2730
- Enumerated
- Sep 23, 2005
- Record last updated
- Dec 23, 2014 (not updated in 12 years: call before relying on the address or phone)
- Fax
- (660) 827-2731
- Medicaid ID
- 1588650741 MO
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,604 in Missouri → Look up another NPI →
Also registered at 3700 W 10TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Elizabeth Current, CNMAdvanced Practice Midwife1396742599
- Fay Evans, ARNPWomen's Health Nurse Practitioner1770580656
- Henry Marquez, M.D.Cardiovascular Disease Physician1700803756
- Connie Messner, FNPFamily Nurse Practitioner1275571986
- David Oberkrom, M.D.Obstetrics & Gynecology Physician1043217938
- Sherry Schwartz, RN BSN BC FNPFamily Nurse Practitioner1659544914
Verify Gregory A. Doak 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 R5C46Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
99% fewer Medicare Part D claims than the average internal medicine physician in 2024
22 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Atorvastatin Calcium11 claims
- Lisinopril11 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.
Gregory A. Doak among 2,604 internal medicine physician records in Missouri
Gregory A. Doak, MD is one of 2,604 internal medicine physician records with a practice address in Missouri. 77% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 92% newer
- In a Medicare fileYes · 77% of these records are
- In the CMS Doctors and Clinicians fileNo · 55% of these records are
- Record last updated2014 · 48% 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 Missouri practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Internal Medicine Physician providers in Missouri
There are 2,604 internal medicine physician records in Missouri.
All 2,604 in Missouri → Every provider in Sedalia → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kenneth Azan, MDSedalia, MO 653011003843848
- Traci Kristofik, DOSedalia, MO 653011962856963
- Justin Lamonda, MDMoberly, MO 652701669601357
- Syed Rashid, M.D.Moberly, MO 652701720058266
- Claire Smith, MDMoberly, MO 652701346745684
- Sharon Carmignani, M.D.Mexico, MO 652651952309890
- Matthew Griffin, M.D.Mexico, MO 652651457500704
- Michael Quinlan, M.D.Mexico, MO 652651134122906
Common questions
What is Gregory A. Doak, MD's NPI number?
Gregory A. Doak, MD's National Provider Identifier (NPI) is 1588650741, issued on Sep 23, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Gregory A. Doak, MD located?
The NPPES record lists a practice address at 3700 W 10TH St, Sedalia, MO, 65301. Phone: (660) 827-2730. Providers update this record themselves, so call before visiting.
How can I verify Gregory A. Doak, MD's license?
NPPES lists Missouri license number R5C46, 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 Gregory A. Doak, MD prescribe under Medicare Part D?
In 2024, Gregory A. Doak, MD had 22 Medicare Part D claims; 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.