Douglas Cornelius, M.D.
Anesthesiology Physician · Billings, MT
Douglas Cornelius, M.D. is an anesthesiology physician with a practice address in Billings, Montana, and NPI 1588631204, issued on Mar 1, 2006. Check the license (Montana 8803, as entered in NPPES) on the Montana Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Douglas Cornelius
- Credential
- M.D.
- Primary taxonomy
- Anesthesiology Physician 207L00000X
- License number
- 8803 MT
Self-reported in NPPES; status is on the state search - Practice location
- 1233 N 30TH St, Billings, MT 59101
- Phone
- (406) 254-0707
- Enumerated
- Mar 1, 2006
- Record last updated
- Jul 8, 2010 (not updated in 16 years: call before relying on the address or phone)
- Fax
- (406) 254-0709
- Entity
- Type 1 · individual
8 nearest anesthesiology physician records → All 227 in Montana → Look up another NPI →
Also registered at 1233 N 30TH St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Abigail AgatepPharmacist1285505024
- Carole Anderson, NNP-BCNeonatal Nurse Practitioner1255617742
- Ty Anderson, MDEmergency Medicine Physician1043889033
- William Anderson, MDPhysical Medicine & Rehabilitation Physician1730125006
- Dean Angell, RNFlight Registered Nurse1265718183
- Charles Aragon, M.D.Anesthesiology Physician1093782591
Verify Douglas Cornelius in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMontana Board of Medical Examiners
Search for license 8803Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
92% fewer Medicare Part D claims than the average anesthesiology physician in 2024
31 Medicare Part D claims, against an average of 402 among the 4,319 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.
Douglas Cornelius among 227 anesthesiology physician records in Montana
Douglas Cornelius, M.D. is one of 227 anesthesiology physician records with a practice address in Montana. 81% 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 12% of them.
- NPI issued2006 · 12% of these records are older, 47% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileNo · 74% of these records are
- Record last updated2010 · 59% 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 Montana practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
67 anesthesiology physician records list a practice address in Billings
They are 67 of the 4,035 NPPES records with a practice address in Billings, and 227 anesthesiology physician records in Montana.
All 227 in Montana → Every provider in Billings → Anesthesiology Physician nationwide →
The 8 anesthesiology physician records with the nearest ZIP codes
- Charles Aragon, M.D.Billings, MT 591011093782591
- Zeferino Arroyo, D.O.Billings, MT 591011285601096
- Stephen Ball, M.D.Billings, MT 591011417924226
- Kert Christensen, D.O.Billings, MT 591011063489771
- Howard Harvey, M.D.Billings, MT 591011922071588
- Debra Jones, M.D.Billings, MT 591011023085677
- Gary Mermel, M.D.Billings, MT 591011558338103
- Blake Mitchell, MDBillings, MT 591011265409825
Common questions
What is Douglas Cornelius, M.D.'s NPI number?
Douglas Cornelius, M.D.'s National Provider Identifier (NPI) is 1588631204, issued on Mar 1, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Douglas Cornelius, M.D. located?
The NPPES record lists a practice address at 1233 N 30TH St, Billings, MT, 59101. Phone: (406) 254-0707. Providers update this record themselves, so call before visiting.
How can I verify Douglas Cornelius, M.D.'s license?
NPPES lists Montana license number 8803, as entered by the provider. Search the Montana Board of Medical Examiners at https://ebiz.mt.gov/POL/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Douglas Cornelius, M.D. prescribe under Medicare Part D?
In 2024, Douglas Cornelius, M.D. had 31 Medicare Part D claims; the average among anesthesiology physician prescribers was 402. 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.