John S. Link, MD
Hematology & Oncology Physician · Orange, CA
John S. Link, MD is a hematology & oncology physician with a practice address in Orange, California, and NPI 1245281211, issued on May 15, 2006. Check the license (California G25774, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John S. Link
- Credential
- MD
- Primary taxonomy
- Hematology & Oncology Physician 207RH0003X
- License number
- G25774 CA
Self-reported in NPPES; status is on the state search - Practice location
- 230 S. Main St, Orange, CA 92868
- Phone
- (714) 541-0101
- Enumerated
- May 15, 2006
- Record last updated
- May 26, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (714) 541-0450
- Medicare enrollment
- Enrolled (PECOS I20130314000234); accepts Medicare assignment
- Medical or professional school
- University Of Southern California Keck School Of Medicine, 1972
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest hematology & oncology physician records → All 1,583 in California → Look up another NPI →
Verify John S. Link in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G25774Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
41% fewer Medicare Part D claims than the average hematology & oncology physician in 2024
517 Medicare Part D claims for 159 beneficiaries, against an average of 877 among the 10,784 providers of this specialty who prescribed in Part D. Brand-name drugs were 19% of claims.
Most prescribed
- Tamoxifen Citrate185 claims
- Raloxifene Hcl67 claims
- Duavee56 claims
- Estradiol34 claims
- Exemestane21 claims
- Dotti14 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 76.7 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $16.07
1 payment: food and beverage; the largest payer was Gilead Sciences, Inc. The 8,560 providers of this specialty with any payment received $7,481.41 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
- Memorialcare Medical FoundationAnaheim, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John S. Link among 1,583 hematology & oncology physician records in California
John S. Link, MD is one of 1,583 hematology & oncology physician records with a practice address in California. 83% 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, 54% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 71% of these records are
- Graduated1972 · median 2003 among the 1,124 with a school on file
- Record last updated2021 · 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 207RH0003X and a California 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 California
There are 1,583 hematology & oncology physician records in California.
All 1,583 in California → Every provider in Orange → Hematology & Oncology Physician nationwide →
The 8 hematology & oncology physician records with the nearest ZIP codes
- Timothy Byun, MDOrange, CA 928681871545012
- Warren Chow, MDOrange, CA 928681093822017
- Paul Coluzzi, M.D.Orange, CA 928681972563906
- Mihaela Cristea, MDOrange, CA 928681417050998
- Sam Huang, M.D.Orange, CA 928681841248812
- Tiberio Lindgren, MDOrange, CA 928681275585424
- Steven Lipkin, MDOrange, CA 928681134153547
- Tariq Mahmood, M.D.Orange, CA 928681104874171
Common questions
What is John S. Link, MD's NPI number?
John S. Link, MD's National Provider Identifier (NPI) is 1245281211, issued on May 15, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John S. Link, MD located?
The NPPES record lists a practice address at 230 S. Main St, Orange, CA, 92868. Phone: (714) 541-0101. Providers update this record themselves, so call before visiting.
How can I verify John S. Link, MD's license?
NPPES lists California license number G25774, 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 S. Link, MD prescribe under Medicare Part D?
In 2024, John S. Link, MD had 517 Medicare Part D claims for 159 beneficiaries; the average among hematology & oncology physician prescribers was 877. Part D covers Medicare prescriptions only.
What is John S. Link, MD's MIPS final score?
The 2023 MIPS final score is 76.7 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.