Robert Errol Porter, DO
Emergency Medicine Physician · Phoenix, AZ
Robert Errol Porter, DO is an emergency medicine physician with a practice address in Phoenix, Arizona, and NPI 1275561565, issued on Jun 28, 2006. Check the license (Arizona 4400, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Robert Errol Porter
- Credential
- DO
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 4400 AZ
Self-reported in NPPES; status is on the state search - Practice location
- 1111 E Mcdowell RD, Phoenix, AZ 85006
- Phone
- (602) 839-6968
- Enumerated
- Jun 28, 2006
- Record last updated
- Jan 5, 2015 (not updated in 11 years: call before relying on the address or phone)
- Fax
- (602) 839-4144
- Medicare enrollment
- Enrolled (PECOS I20070419000661); accepts Medicare assignment
- Medical or professional school
- Arizona College Of Osteopathic Medicine Mid Western University, 2003
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,494 in Arizona → Look up another NPI →
Also registered at 1111 E Mcdowell RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Robert Errol Porter in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 4400Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
46% more Medicare Part D claims than the average emergency medicine physician in 2024
330 Medicare Part D claims for 227 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 6% of claims. 50 claims were for opioids.
Most prescribed
- Cefdinir38 claims
- Hydrocodone-Acetaminophen37 claims
- Naproxen21 claims
- Ondansetron Hcl19 claims
- Sulfamethoxazole-Trimethoprim18 claims
- Sucralfate16 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.
Bills Medicare through 3 group practices
- Cep America- Arizona, PCChandler, AZ
- Emergency Professional Services PCPhoenix, AZ
- Tec Emergency Physicians OF Arizona, LLCMesa, AZ
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Robert Errol Porter among 1,494 emergency medicine physician records in Arizona
Robert Errol Porter, DO 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 2006, is newer than 10% of them.
- NPI issued2006 · 10% of these records are older, 62% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2003 · median 2014 among the 828 with a school on file
- Record last updated2015 · 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).
394 emergency medicine physician records list a practice address in Phoenix
They are 394 of the 31,399 NPPES records with a practice address in Phoenix, and 1,494 emergency medicine physician records in Arizona.
All 1,494 in Arizona → Every provider in Phoenix → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Michael Bergman, MDPhoenix, AZ 850061770504292
- Moneesh Bhow, M.DPhoenix, AZ 850061215986096
- Andrzej Dmowski, MDPhoenix, AZ 850061518960996
- Robert Leigh, MDPhoenix, AZ 850061568483139
- Melissa Ludwig, MDPhoenix, AZ 850061750302352
- Alan Molk, MDPhoenix, AZ 850061134133580
- Ayrn O'Connor, M.D.Phoenix, AZ 850061194785063
- John Raife, MDPhoenix, AZ 850061609835180
Common questions
What is Robert Errol Porter, DO's NPI number?
Robert Errol Porter, DO's National Provider Identifier (NPI) is 1275561565, issued on Jun 28, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Robert Errol Porter, DO located?
The NPPES record lists a practice address at 1111 E Mcdowell RD, Phoenix, AZ, 85006. Phone: (602) 839-6968. Providers update this record themselves, so call before visiting.
How can I verify Robert Errol Porter, DO's license?
NPPES lists Arizona license number 4400, 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.
How much does Robert Errol Porter, DO prescribe under Medicare Part D?
In 2024, Robert Errol Porter, DO had 330 Medicare Part D claims for 227 beneficiaries; the average among emergency medicine physician prescribers was 226. 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.