Steven Robert Callahan, M.D.
Emergency Medicine Physician · Newport Beach, CA
Steven Robert Callahan, M.D. is an emergency medicine physician with a practice address in Newport Beach, California, and NPI 1164485991, issued on Apr 11, 2006. Check the license (California G41150, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Steven Robert Callahan
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- G41150 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1 Hoag Dr, Newport Beach, CA 92663
- Phone
- (949) 764-5689
- Enumerated
- Apr 11, 2006
- Record last updated
- Sep 19, 2012 (not updated in 14 years: call before relying on the address or phone)
- Fax
- (405) 751-3183
- Medicaid IDs
- 00G411500 CA
OOG411500670 CA - Medicare enrollment
- Enrolled (PECOS I20041028000447); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 7,751 in California → Look up another NPI →
Also registered at 1 Hoag Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Anatoly Akselrod, PHARMDPharmacist1508733379
- Bahram Alavynejad, MDPulmonary Disease Physician1124071972
- Eric Alcouloumre, M.D.Emergency Medicine Physician1568425312
- Gilda Ameri, MDHospitalist Physician1821477498
- Anna-Maria Angelakis, M.D.Hospitalist Physician1124259890
Verify Steven Robert Callahan in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G41150Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
42% fewer Medicare Part D claims than the average emergency medicine physician in 2024
132 Medicare Part D claims for 100 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims. 25 claims were for opioids.
Most prescribed
- Oxycodone Hcl21 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.
No measured MIPS final score for 2023
CMS assigned the neutral MIPS final score of 75 without scoring Quality, Cost, Promoting Interoperability or Improvement Activities. It is an administrative threshold, so PlainDoctor does not compare it with measured clinicians.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Bills Medicare through one group practice
- Emergency Physicians OF Orange CountyNewport Beach, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Steven Robert Callahan among 7,751 emergency medicine physician records in California
Steven Robert Callahan, M.D. is one of 7,751 emergency medicine 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 4% of them.
- NPI issued2006 · 4% of these records are older, 60% newer
- In a Medicare fileYes · 81% of these records are
- In the CMS Doctors and Clinicians fileYes · 59% of these records are
- Graduated1978 · median 2011 among the 4,560 with a school on file
- Record last updated2012 · 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 207P00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Emergency Medicine Physician providers in California
There are 7,751 emergency medicine physician records in California.
All 7,751 in California → Every provider in Newport Beach → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Eric Alcouloumre, M.D.Newport Beach, CA 926631568425312
- David Christy, M.D.Newport Beach, CA 926631619930492
- Michael Contino, M.D.Newport Beach, CA 926631528021300
- Darrin Fryer, M.D.Newport Beach, CA 926631578526356
- Charles Goldsworthy, M.D.Newport Beach, CA 926631932162773
- Brian Grade, M.D.Newport Beach, CA 926631932162724
- Jonathan Houpt, M.D.Newport Beach, CA 926631447258199
- Pascal Juang, M.D.Newport Beach, CA 926631164485967
Common questions
What is Steven Robert Callahan, M.D.'s NPI number?
Steven Robert Callahan, M.D.'s National Provider Identifier (NPI) is 1164485991, issued on Apr 11, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Steven Robert Callahan, M.D. located?
The NPPES record lists a practice address at 1 Hoag Dr, Newport Beach, CA, 92663. Phone: (949) 764-5689. Providers update this record themselves, so call before visiting.
How can I verify Steven Robert Callahan, M.D.'s license?
NPPES lists California license number G41150, 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 Steven Robert Callahan, M.D. prescribe under Medicare Part D?
In 2024, Steven Robert Callahan, M.D. had 132 Medicare Part D claims for 100 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Steven Robert Callahan, M.D.'s MIPS final score?
CMS assigned the neutral MIPS final score of 75 for 2023 without scoring any category, so it is not a measured result.
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.