Helen Lo, MD
NPI 1225230618 · Emergency Medicine Physician · Tucson, AZ
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Helen Lo, MD is a Emergency Medicine Physician provider in Tucson, AZ (NPI 1225230618).
Provider details
- NPI number
- 1225230618
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD438210 (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
3 documented practice locations
- Medicare service volume (vs. specialty peers)25% of score
240 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 84 | $117 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 73 | $166 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 42 | $8 |
| Emergency Department Visit With Low Level of Medical Decision Making99283 | 25 | $69 |
| Critical Care, First 30-74 Minutes99291 | 16 | $205 |
Typical Medicare-allowed amounts for these services range $8–$205 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetronbrand: Ondansetron Odt | 35 | 35 |
| Methylprednisolone | 23 | 23 |
| Ketorolac Tromethamine | 17 | 17 |
| Prednisone | 16 | 16 |
| Cyclobenzaprine Hcl | 15 | 15 |
| Cefdinir | 14 | 14 |
| Cephalexin | 14 | 14 |
| Oxycodone Hcl/Acetaminophen |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$86 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Additional practice locations (2)
- 620 Shadow LnLas Vegas, NV 89106-4119Phone: (702) 388-4000
- 1020 Sansom StSte 239Philadelphia, PA 19107-5002Phone: (215) 955-6844Fax: (215) 955-2526
Registry dates
- Enumerated
- 2007-06-05
- Last updated
- 2024-12-30
- Certified
- 2024-12-21
Frequently asked questions
- What is Helen Lo's NPI number?
- Helen Lo's National Provider Identifier (NPI) is 1225230618, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Helen Lo's specialty?
- Helen Lo is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Helen Lo located?
- Helen Lo's practice location on file with NPPES is 4072 E Via De La Tangara, Tucson, AZ 85718-3307.
- What is Helen Lo's phone number?
- The practice phone number listed in the NPPES registry for Helen Lo is (267) 850-3600.
- Does Helen Lo accept Medicare?
- Helen Lo is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Helen Lo's NPI active?
- Yes — Helen Lo's NPI (1225230618) is active in the NPPES registry as of the last update on 2024-12-30.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.