Isaac J. Farrell, MD
Emergency Medicine Physician · Tucson, AZ
Isaac J. Farrell, MD is an emergency medicine physician with a practice address in Tucson, Arizona, and NPI 1053587881, issued on May 1, 2008. Check the license (Arizona 1234, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Isaac J. Farrell
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 1234 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 2800 E Ajo Way, Tucson, AZ 85713
- Phone
- (520) 874-2800
- Enumerated
- May 1, 2008
- Record last updated
- Mar 10, 2009 (not updated in 17 years: call before relying on the address or phone)
- Fax
- (520) 874-6863
- Medicaid ID
- 340599 AZ
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,494 in Arizona → Look up another NPI →
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A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Isaac J. Farrell in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 1234Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The MIPS final score for 2023 (Medicare payment program): 97.6 of 100
The Merit-based Incentive Payment System score is reported for this clinician. 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; category weights for 2023 (qpp.cms.gov).
Isaac J. Farrell among 1,494 emergency medicine physician records in Arizona
Isaac J. Farrell, MD is one of 1,494 emergency medicine physician records with a practice address in Arizona. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 44% of them.
- NPI issued2008 · 44% of these records are older, 52% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileNo · 55% of these records are
- Record last updated2009 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Arizona practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
422 emergency medicine physician records list a practice address in Tucson
They are 422 of the 18,788 NPPES records with a practice address in Tucson, and 1,494 emergency medicine physician records in Arizona.
All 1,494 in Arizona → Every provider in Tucson → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Matthew Berkman, M.D.Tucson, AZ 857131992739643
- Santosh Davies, MDTucson, AZ 857131063485357
- Kurt Denninghoff, MDTucson, AZ 857131518948843
- Kristi Grall, MDTucson, AZ 857131851342604
- Thomas Kinane, M.DTucson, AZ 857131366462954
- Bernhard Knoblich, MDTucson, AZ 857131518066802
- Kevin Maxey, MDTucson, AZ 857131720187263
- Alice Min Simpkins, MDTucson, AZ 857131821201872
Common questions
What is Isaac J. Farrell, MD's NPI number?
Isaac J. Farrell, MD's National Provider Identifier (NPI) is 1053587881, issued on May 1, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Isaac J. Farrell, MD located?
The NPPES record lists a practice address at 2800 E Ajo Way, Tucson, AZ, 85713. Phone: (520) 874-2800. Providers update this record themselves, so call before visiting.
How can I verify Isaac J. Farrell, MD's license?
NPPES lists Arizona license number 1234, 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.
What is Isaac J. Farrell, MD's MIPS final score?
The 2023 MIPS final score is 97.6 of 100. 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.