NPPES file of Aug 9, 2026

Celso A. Gangan, M.D

Internal Medicine Physician · Redmond, OR

Celso A. Gangan, M.D is an internal medicine physician with a practice address in Redmond, Oregon, and NPI 1598761959, issued on Jun 21, 2005. Check the license (Oregon MD23086, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1598761959
Name
Celso A. Gangan
Credential
M.D
Primary taxonomy
Internal Medicine Physician 207R00000X
License number
MD23086 OR
Self-reported in NPPES; status is on the state search
Practice location
1245 NW 4TH St, Redmond, OR 97756
Phone
(541) 323-4545
Enumerated
Jun 21, 2005
Record last updated
Nov 28, 2011 (not updated in 15 years: call before relying on the address or phone)
Fax
(541) 323-4546
Medicaid ID
287491 OR
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). A record is not a license: verify it with the state board.
Download card Updates feed

8 nearest internal medicine physician records → All 2,116 in Oregon → Look up another NPI →

Also registered at 1245 NW 4TH St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Michael Edmondson, RPHPharmacist1508160839
  2. Jonathan Elek, RPHPharmacist1417259888
  3. Harold Palmer, MDInternal Medicine Physician1841296209

Verify Celso A. Gangan in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersOregon Medical Board
    Search for license MD23086    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Oregon license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

Is this page about you? You can ask us to correct, restrict or remove it: how.

99% fewer Medicare Part D claims than the average internal medicine physician in 2024

25 Medicare Part D claims, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D.

  1. Celso Gangan25
  2. Specialty average3,176

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.

Celso A. Gangan among 2,116 internal medicine physician records in Oregon

Celso A. Gangan, M.D is one of 2,116 internal medicine physician records with a practice address in Oregon. 73% 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, 93% newer
  • In a Medicare fileYes · 73% of these records are
  • In the CMS Doctors and Clinicians fileNo · 58% of these records are
  • Record last updated2011 · 58% 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 Oregon 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 Oregon

There are 2,116 internal medicine physician records in Oregon.

All 2,116 in Oregon → Every provider in Redmond → Internal Medicine Physician nationwide →

The 8 internal medicine physician records with the nearest ZIP codes

  1. Emily Harvey, M.D.Redmond, OR 977561528294345
  2. Anne Killingbeck, M.D.Redmond, OR 977561740471648
  3. Laura Nicholson, MDRedmond, OR 977561578513552
  4. Harold Palmer, MDRedmond, OR 977561841296209
  5. Mark Sternfeld, MD, PHDRedmond, OR 977561023071792
  6. David Tretheway, MDRedmond, OR 977561831152982
  7. Randy Visser, DORedmond, OR 977561801859574
  8. Mark Thibert, MDPrineville, OR 977541225104235

Common questions

What is Celso A. Gangan, M.D's NPI number?

Celso A. Gangan, M.D's National Provider Identifier (NPI) is 1598761959, issued on Jun 21, 2005. An NPI identifies a provider in billing; it is not a license.

Where is Celso A. Gangan, M.D located?

The NPPES record lists a practice address at 1245 NW 4TH St, Redmond, OR, 97756. Phone: (541) 323-4545. Providers update this record themselves, so call before visiting.

How can I verify Celso A. Gangan, M.D's license?

NPPES lists Oregon license number MD23086, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does Celso A. Gangan, M.D prescribe under Medicare Part D?

In 2024, Celso A. Gangan, M.D had 25 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.