Rex Chang Manayan, M.D.
Vascular Surgery Physician · Ontario, CA
Rex Chang Manayan, M.D. is a vascular surgery physician with a practice address in Ontario, California, and NPI 1649278599, issued on Jul 13, 2005. Check the license (California G86289, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Rex Chang Manayan
- Credential
- M.D.
- Primary taxonomy
- Vascular Surgery Physician 2086S0129X
- License numbers
- G86289 CA
67209 AZ
DR.0059259 CO
Self-reported in NPPES; status is on the state search - Practice location
- 3333 Concours Ste 100, Ontario, CA 91764
- Phone
- (909) 481-3242
- Enumerated
- Jul 13, 2005
- Record last updated
- Nov 13, 2025
- Fax
- (909) 481-3243
- Medicaid ID
- 154997 AZ
- Medicare enrollment
- Enrolled (PECOS I20220809001147); accepts Medicare assignment
- Medical or professional school
- Tufts University School Of Medicine, 1991
- Entity
- Type 1 · individual
8 nearest vascular surgery physician records → All 580 in California → Look up another NPI →
Also registered at 3333 Concours Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Bertrand Janne D'Othee, M.D.Diagnostic Radiology Physician1760440267
Verify Rex Chang Manayan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G86289Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Industry payments in 2024: $111.09
5 payments; by number, the most common kind was food and beverage; the largest payer was Medtronic, Inc. The 4,059 providers of this specialty with any payment received $6,178.00 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 2 group practices
- Arizona Uvc Medical PLLCGoodyear, AZ
- Empire Vein And Vascular SpecialistsRancho Mirage, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Rex Chang Manayan among 580 vascular surgery physician records in California
Rex Chang Manayan, M.D. is one of 580 vascular surgery physician records with a practice address in California. 84% 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, 94% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1991 · median 2003 among the 411 with a school on file
- Record last updated2025 · 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 2086S0129X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Vascular Surgery Physician providers in California
There are 580 vascular surgery physician records in California.
All 580 in California → Every provider in Ontario → Vascular Surgery Physician nationwide →
The 8 vascular surgery physician records with the nearest ZIP codes
- Edwin Kendrick, MDOntario, CA 917641265730618
- Andrew Ahn, M.D.Pomona, CA 917671356363543
- Jerry Kim, MDPomona, CA 917671912295510
- Alexander Lam, MDPomona, CA 917671205497104
- Ayyampalayam MohanPomona, CA 917671407952229
- Gilbert Turner, M.D.Upland, CA 917861407928583
- Alfonso Miguel, M.D.Glendora, CA 917401124200381
- Khan Hameed, MDWest Covina, CA 917901558329623
Common questions
What is Rex Chang Manayan, M.D.'s NPI number?
Rex Chang Manayan, M.D.'s National Provider Identifier (NPI) is 1649278599, issued on Jul 13, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Rex Chang Manayan, M.D. located?
The NPPES record lists a practice address at 3333 Concours Ste 100, Ontario, CA, 91764. Phone: (909) 481-3242. Providers update this record themselves, so call before visiting.
How can I verify Rex Chang Manayan, M.D.'s license?
NPPES lists California license number G86289, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. 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), 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.