Robin L. Obenchain, MD
Hematology & Oncology Physician · Chandler, AZ
Robin L. Obenchain, MD is a hematology & oncology physician with a practice address in Chandler, Arizona, and NPI 1508829094, issued on Apr 7, 2006. Check the license (Arizona 35188, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Robin L. Obenchain
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- 35188 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 1110 S Dobson RD Ste 1, Chandler, AZ 85286
- Phone
- (623) 238-7540
- Enumerated
- Apr 7, 2006
- Record last updated
- Feb 23, 2026
- Fax
- (480) 899-5216
- Medicare enrollment
- Enrolled (PECOS I20060608000272); accepts Medicare assignment
- Medical or professional school
- Virginia Commonwealth University, School Of Medicine, 1999
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 285 in Arizona → Look up another NPI →
Also registered at 1110 S Dobson RD Ste 1
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Arun Singavi, M.D., M.S.Hematology & Oncology Physician1417222548
Verify Robin L. Obenchain in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 35188Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
831 Medicare Part D claims for 197 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. 82 claims were for opioids.
Most prescribed
- Anastrozole100 claims
- Ibrance35 claims
- Ondansetron Hcl34 claims
- Azithromycin33 claims
- Letrozole31 claims
- Warfarin Sodium31 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.
Bills Medicare through one group practice
- Honorhealth AmbulatoryScottsdale, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robin L. Obenchain among 285 hematology & oncology physician records in Arizona
Robin L. Obenchain, MD is one of 285 hematology & oncology physician records with a practice address in Arizona. 85% 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 8% of them.
- NPI issued2006 · 8% of these records are older, 58% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 80% of these records are
- Graduated1999 · median 2003 among the 229 with a school on file
- Record last updated2026 · 37% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RH0003X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Hematology & Oncology Physician providers in Arizona
There are 285 hematology & oncology physician records in Arizona.
All 285 in Arizona → Every provider in Chandler → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Arun Singavi, M.D., M.S.Chandler, AZ 852861417222548
- Harrison Bachrach, MDTempe, AZ 852841316910102
- Hermina Fernandes, MBBS, FACPTempe, AZ 852841700191947
- Jasgit Sachdev, M.D.Tempe, AZ 852831770706632
- Alex Liu, MDGilbert, AZ 852971306335047
- Kalyan Mantripragada, MDGilbert, AZ 852971396911939
- Onyemaechi Okolo-Taku, M.D.Gilbert, AZ 852971609254788
- Puneet Raman, MDGilbert, AZ 852971659909612
Common questions
What is Robin L. Obenchain, MD's NPI number?
Robin L. Obenchain, MD's National Provider Identifier (NPI) is 1508829094, issued on Apr 7, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robin L. Obenchain, MD located?
The NPPES record lists a practice address at 1110 S Dobson RD Ste 1, Chandler, AZ, 85286. Phone: (623) 238-7540. Providers update this record themselves, so call before visiting.
How can I verify Robin L. Obenchain, MD's license?
NPPES lists Arizona license number 35188, as entered by the provider. Search the Arizona Medical Board at https://www.azmd.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Robin L. Obenchain, MD prescribe under Medicare Part D?
In 2024, Robin L. Obenchain, MD had 831 Medicare Part D claims for 197 beneficiaries; the average among hematology & oncology physician prescribers was 877. 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.