John Fleagle, MD
Hematology & Oncology Physician · Boulder, CO
John Fleagle, MD is a hematology & oncology physician with a practice address in Boulder, Colorado, and NPI 1346224433, issued on Dec 1, 2005. Check the license (Colorado 23933, as entered in NPPES) on the Colorado Medical Board; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John Fleagle
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 23933 CO
Self-reported in NPPES; status is on the state search - Practice location
- 4715 Arapahoe Ave, Boulder, CO 80303
- Phone
- (303) 385-2000
- Enumerated
- Dec 1, 2005
- Entity
- Type 1 · individual
Also registered at 4715 Arapahoe Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- David Andorsky, MDHematology & Oncology Physician1609061837
- Andrew Antell, MDRadiation Oncology Physician1508840158
- Terri Bauer, LCSWClinical Social Worker1841509056
- Gregory Britt, M.D.Hematology & Oncology Physician1982645982
- Leslie Busby, MDHematology & Oncology Physician1952385502
- Anne Haakenson, RNRegistered Nurse1568307890
Verify John Fleagle in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersColorado Medical Board
Search for license 23933Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
Hematology & Oncology Physician providers in Colorado
There are 173 hematology & oncology physician records in Colorado. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
Other hematology & oncology physician records in Colorado
- Anosheh Afghahi, MDAurora, CO1689981656
- Raul Alvarez, M.D.Englewood, CO1376597260
- Maria Amaya, MDAurora, CO1598150856
- David Andorsky, MDBoulder, CO1609061837
- Travis Archuleta, MDPueblo, CO1457335010
- Louis Balizet, MDPueblo, CO1831173574
- John Barnett, MDLongmont, CO1952341273
- Michele Basche, MDDenver, CO1306820022
- Scott Bearman, MDDenver, CO1528042249
- Florencia Benton, M.D.Littleton, CO1427203033
Common questions
What is John Fleagle, MD's NPI number?
John Fleagle, MD's National Provider Identifier (NPI) is 1346224433, issued on Dec 1, 2005. An NPI identifies a provider in billing; it is not a license.
Where is John Fleagle, MD located?
The NPPES record lists a practice address at 4715 Arapahoe Ave, Boulder, CO, 80303. Phone: (303) 385-2000. Providers update this record themselves, so call before visiting.
How can I verify John Fleagle, MD's license?
NPPES lists Colorado license number 23933, as entered by the provider. Search the Colorado Medical Board at https://dpo.colorado.gov/Medical. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.