Lee Maas, M.D.
NPI 1548470081 · Emergency Medicine Physician · Pomona, CA
Enrolled with Medicare as Practitioner - Emergency Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Lee Maas, M.D. is a Emergency Medicine Physician provider in Pomona, CA (NPI 1548470081).
Provider details
- NPI number
- 1548470081
- Entity type
- Individual
- Primary specialty
- Emergency Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A101495 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
548 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report Only93010 | 217 | $9 |
| Emergency Department Visit With High Level of Medical Decision Making99285 | 151 | $185 |
| Critical Care, First 30-74 Minutes99291 | 88 | $228 |
| Emergency Department Visit With Moderate Level of Medical Decision Making99284 | 51 | $128 |
| X-Ray of Chest, 1 View71045 | 28 | $9 |
| Emergent Insertion of Breathing Tube Into Windpipe Using an Endoscope31500 | 13 | $148 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Ondansetronbrand: Ondansetron Odt | 25 | 24 |
| Methylprednisolone | 23 | 22 |
| Albuterol Sulfatebrand: Albuterol Sulfate Hfa | 20 | 17 |
| Cephalexin | 18 | 18 |
| Ibuprofen | 16 | 16 |
| Sulfamethoxazole/Trimethoprimbrand: Sulfamethoxazole-Trimethoprim | 14 | 14 |
| Prednisone | 13 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-23
- Last updated
- 2013-08-18
Frequently asked questions
- What is Lee Maas's NPI number?
- Lee Maas's National Provider Identifier (NPI) is 1548470081, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Lee Maas's specialty?
- Lee Maas is listed in the NPPES registry with a primary specialty of Emergency Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Lee Maas located?
- Lee Maas's practice location on file with NPPES is 1798 N Garey Ave, Pomona, CA 91767-2918.
- What is Lee Maas's phone number?
- The practice phone number listed in the NPPES registry for Lee Maas is (909) 865-9500.
- Does Lee Maas accept Medicare?
- Lee Maas is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Lee Maas's NPI active?
- Yes — Lee Maas's NPI (1548470081) is active in the NPPES registry as of the last update on 2013-08-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.