John Michael Finley, DO
Rheumatology Physician · Chino, CA
John Michael Finley, DO is a rheumatology physician with a practice address in Chino, California, and NPI 1922042076, issued on Jun 16, 2006. Check the license (California 20A5583, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Michael Finley
- Credential
- DO
- Primary taxonomy
- Rheumatology Physician 207RR0500X
- License number
- 20A5583 CA
Self-reported in NPPES; status is on the state search - Practice location
- 13193 Central Ave Ste 100, Chino, CA 91710
- Phone
- (909) 464-9675
- Enumerated
- Jun 16, 2006
- Record last updated
- Feb 11, 2026
- Medicaid ID
- 00AX55830 CA
- Medicare enrollment
- Enrolled (PECOS I20090126000574); may accept Medicare assignment
- Medical or professional school
- Midwestern University, Chicago College Of Osteopathic Med, 1986
- Entity
- Type 1 · individual
8 nearest rheumatology physician records → All 926 in California → Look up another NPI →
Also registered at 13193 Central Ave Ste 100
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Janice ChanFamily Medicine Physician1013346873
- Christine Guirges, PA-CFamily Medicine Physician1215777859
- Joseph Krachenfels, D.O.Family Medicine Physician1780942110
- Dono MarbunFamily Nurse Practitioner1487298188
- Alan Ung, MDFamily Medicine Physician1467036012
Verify John Michael Finley in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 20A5583Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
4% more Medicare Part D claims than the average rheumatology physician in 2024
2,053 Medicare Part D claims for 177 beneficiaries, against an average of 1,978 among the 6,301 providers of this specialty who prescribed in Part D. Brand-name drugs were 9% of claims. 42 claims were for opioids.
Most prescribed
- Metformin Hcl137 claims
- Atorvastatin Calcium127 claims
- Amlodipine Besylate98 claims
- Losartan Potassium83 claims
- Lisinopril79 claims
- Levothyroxine Sodium60 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: $925.74
5 payments; by number, the most common kind was grant; the largest payer was Acumed LLC. The 4,486 providers of this specialty with any payment received $8,538.33 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
- Health Service AllianceMontclair, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Michael Finley among 926 rheumatology physician records in California
John Michael Finley, DO is one of 926 rheumatology physician records with a practice address in California. 81% 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 6% of them.
- NPI issued2006 · 6% of these records are older, 55% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 69% of these records are
- Graduated1986 · median 2003 among the 641 with a school on file
- Record last updated2026 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RR0500X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Rheumatology Physician providers in California
There are 926 rheumatology physician records in California.
All 926 in California → Every provider in Chino → Rheumatology Physician nationwide →
The 8 rheumatology physician records with the nearest ZIP codes
- Sapna Rasania, M.D., M.P.H.Chino, CA 917101427336759
- Linda Atkinson, MDBaldwin Park, CA 917061811064736
- Jennifer Jang, M.D.Baldwin Park, CA 917061023249802
- Helen Lu, MDBaldwin Park, CA 917061750458691
- Ariel Bryant, PACovina, CA 917221578106597
- Christina Chen, DOCovina, CA 917221952661829
- Yanisa Chuenkasamekul, PA-CCovina, CA 917221184266678
- Samy Metyas, MDCovina, CA 917221831104694
Common questions
What is John Michael Finley, DO's NPI number?
John Michael Finley, DO's National Provider Identifier (NPI) is 1922042076, issued on Jun 16, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Michael Finley, DO located?
The NPPES record lists a practice address at 13193 Central Ave Ste 100, Chino, CA, 91710. Phone: (909) 464-9675. Providers update this record themselves, so call before visiting.
How can I verify John Michael Finley, DO's license?
NPPES lists California license number 20A5583, 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 John Michael Finley, DO prescribe under Medicare Part D?
In 2024, John Michael Finley, DO had 2,053 Medicare Part D claims for 177 beneficiaries; the average among rheumatology physician prescribers was 1,978. 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.