Helen G. Lo, MD
Emergency Medicine Physician · Tucson, AZ
Helen G. Lo, MD is an emergency medicine physician with a practice address in Tucson, Arizona, and NPI 1225230618, issued on Jun 5, 2007. Check the license (Arizona 66924, as entered in NPPES) on the Arizona Medical Board; the Medicare figures below come from public CMS files.
- Name
- Helen G. Lo
- Credential
- MD
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License numbers
- 66924 AZ
22389 NV
MD438210 PA
MT190643 PA
Self-reported in NPPES; status is on the state search - Practice location
- 4072 E Via DE LA Tangara, Tucson, AZ 85718
- Phone
- (267) 850-3600
- Enumerated
- Jun 5, 2007
- Record last updated
- Dec 30, 2024
- Medicaid IDs
- 102617951 PA
0268232 NJ - Medicare enrollment
- Enrolled (PECOS I20210916000183); accepts Medicare assignment
- Medical or professional school
- New York University School Of Medicine, 2007
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,494 in Arizona → Look up another NPI →
Verify Helen G. Lo in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersArizona Medical Board
Search for license 66924Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
31% more Medicare Part D claims than the average emergency medicine physician in 2024
295 Medicare Part D claims for 162 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. Brand-name drugs were 4% of claims. 27 claims were for opioids.
Most prescribed
- Ondansetron Odt35 claims
- Methylprednisolone23 claims
- Ketorolac Tromethamine17 claims
- Prednisone16 claims
- Cyclobenzaprine Hcl15 claims
- Cefdinir14 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): 97.8 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: $85.74
1 payment: food and beverage; the largest payer was Dentsply Sirona Inc. The 12,335 providers of this specialty with any payment received $953.79 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 5 group practices
- Bluff Creek Emergency Medicine Associates, PAEl Paso, TX
- Edinburg Emergency Medicine Associates PAMission, TX
- Northwest Hbp Medical Services LLCOro Valley, AZ
- Pearsall Emergency Medicine Associates, PAEl Paso, TX
- Winnemucca Emergency Physicians LLCWinnemucca, NV
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Helen G. Lo among 1,494 emergency medicine physician records in Arizona
Helen G. Lo, 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 2007, is newer than 38% of them.
- NPI issued2007 · 38% of these records are older, 56% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 55% of these records are
- Graduated2007 · median 2014 among the 828 with a school on file
- Record last updated2024 · 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
- Jodee Meddy, D.O.Tucson, AZ 857181699934240
- Sundeep Punia, MDTucson, AZ 857181326304106
- Kristine Stark-Leyva, MDTucson, AZ 857181578654984
- Jeremy Carter, D.O.Tucson, AZ 857191619387271
- Eric Chase, M.D.Tucson, AZ 857191881857910
- James Dahle, MDTucson, AZ 857191811963242
- Bridget Dyer, M.D.Tucson, AZ 857191942473467
- Leah Gilbert, M.D.Tucson, AZ 857191699904185
Common questions
What is Helen G. Lo, MD's NPI number?
Helen G. Lo, MD's National Provider Identifier (NPI) is 1225230618, issued on Jun 5, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Helen G. Lo, MD located?
The NPPES record lists a practice address at 4072 E Via DE LA Tangara, Tucson, AZ, 85718. Phone: (267) 850-3600. Providers update this record themselves, so call before visiting.
How can I verify Helen G. Lo, MD's license?
NPPES lists Arizona license number 66924, 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 Helen G. Lo, MD prescribe under Medicare Part D?
In 2024, Helen G. Lo, MD had 295 Medicare Part D claims for 162 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
What is Helen G. Lo, MD's MIPS final score?
The 2023 MIPS final score is 97.8 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.