Donald L. Hamby, D.O.
Physical Medicine & Rehabilitation Physician · Grand Terrace, CA
Donald L. Hamby, D.O. is a physical medicine & rehabilitation physician with a practice address in Grand Terrace, California, and NPI 1750726485, issued on May 8, 2013. Check the license (California 20A14027, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Donald L. Hamby
- Credential
- D.O.
- Primary taxonomy
- Physical Medicine & Rehabilitation Physician 208100000X
- License number
- 20A14027 CA
Self-reported in NPPES; status is on the state search - Practice location
- 11980 Mount Vernon Ave, Grand Terrace, CA 92313
- Phone
- (909) 864-1097
- Enumerated
- May 8, 2013
- Record last updated
- Feb 26, 2026
- Medicare enrollment
- Enrolled (PECOS I20190315002317); accepts Medicare assignment
- Medical or professional school
- Lincoln Memorial University Medical Department, 2013
- Entity
- Type 1 · individual
8 nearest physical medicine & rehabilitation physician records → All 1,549 in California → Look up another NPI →
Also registered at 11980 Mount Vernon Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Margaret Amoo, NURSE PRACTITIONERFamily Nurse Practitioner1164057022
- Noemi AvilaPediatric Nurse Practitioner1023691623
- Eric Eschweiler, DNP, RN, FNP-CFamily Nurse Practitioner1912396201
- Philip Farabaugh, MDFamily Medicine Physician1285763615
- Ramon Ferra, MDObstetrics & Gynecology Physician1285614750
- Ashley Fonseca-Tweed, FNP-BCFamily Nurse Practitioner1275316176
Verify Donald L. Hamby in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A14027Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
44% fewer Medicare Part D claims than the average physical medicine & rehabilitation physician in 2024
406 Medicare Part D claims for 45 beneficiaries, against an average of 727 among the 7,448 providers of this specialty who prescribed in Part D. 164 claims were for opioids.
Most prescribed
- Hydrocodone-Acetaminophen111 claims
- Gabapentin75 claims
- Pregabalin47 claims
- Tramadol Hcl47 claims
- Buprenorphine-Naloxone22 claims
- Duloxetine Hcl18 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.
Industry payments in 2024: $20.70
1 payment: food and beverage; the largest payer was Merck Sharp & Dohme LLC. The 3,895 providers of this specialty with any payment received $1,237.86 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 one group practice
- Riverside-San Bernardino County Indian Health IncBanning, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Donald L. Hamby among 1,549 physical medicine & rehabilitation physician records in California
Donald L. Hamby, D.O. is one of 1,549 physical medicine & rehabilitation physician records with a practice address in California. 59% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2013, is newer than 56% of them.
- NPI issued2013 · 56% of these records are older, 42% newer
- In a Medicare fileYes · 59% of these records are
- In the CMS Doctors and Clinicians fileYes · 51% of these records are
- Graduated2013 · median 2008 among the 786 with a school on file
- Record last updated2026 · 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 208100000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Physical Medicine & Rehabilitation Physician providers in California
There are 1,549 physical medicine & rehabilitation physician records in California.
All 1,549 in California → Every provider in Grand Terrace → Physical Medicine & Rehabilitation Physician nationwide →
The 8 physical medicine & rehabilitation physician records with the nearest ZIP codes
- Robertus Kounang, M.D.Colton, CA 923241689674582
- Robert Lugo, D.O.Colton, CA 923241619311412
- Karen PenaGrand Terrace, CA 923241821698325
- Filemon Quinio, MDColton, CA 923241346332715
- Adrianne Beck, MDFontana, CA 923351285773986
- Christine Diaz, M.D.Fontana, CA 923351306032537
- Gerald Goodlow, MDFontana, CA 923351396884094
- Mustafa Khan, M.D.Fontana, CA 923351710253430
Common questions
What is Donald L. Hamby, D.O.'s NPI number?
Donald L. Hamby, D.O.'s National Provider Identifier (NPI) is 1750726485, issued on May 8, 2013. An NPI identifies a provider in billing; it is not a license.
Where is Donald L. Hamby, D.O. located?
The NPPES record lists a practice address at 11980 Mount Vernon Ave, Grand Terrace, CA, 92313. Phone: (909) 864-1097. Providers update this record themselves, so call before visiting.
How can I verify Donald L. Hamby, D.O.'s license?
NPPES lists California license number 20A14027, 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.
How much does Donald L. Hamby, D.O. prescribe under Medicare Part D?
In 2024, Donald L. Hamby, D.O. had 406 Medicare Part D claims for 45 beneficiaries; the average among physical medicine & rehabilitation physician prescribers was 727. 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.