Walter Maier, MD,MPH
NPI 1235175233 · Preventive Medicine/Occupational Environmental Medicine Physician · Lake Arrowhead, CA
Enrolled with Medicare as Practitioner - Preventive Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Walter Maier, MD,MPH is a Preventive Medicine/Occupational Environmental Medicine Physician provider in Lake Arrowhead, CA (NPI 1235175233).
Provider details
- NPI number
- 1235175233
- Entity type
- Individual
- Primary specialty
- Preventive Medicine/Occupational Environmental Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD,MPH
- Sex
- Male
- Sole proprietor
- No
- License
- G82114 (CA)
Specialties & taxonomies
- Preventive Medicine/Occupational Environmental Medicine PhysicianPrimary2083P0500XLicense G82114 (CA)
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
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
763 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 546 | $124 |
| Subsequent Nursing Facility Care With Moderate Level of Medical Decision Making, Per Day, If Using Time, at Least 30 Minutes99309 | 64 | $103 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 57 | $165 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 34 | $89 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 30 | $121 |
| Destruction of Precancer Skin Growth, 1 Growth |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 141 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 325 | 90 |
| Losartan Potassium | 291 | 86 |
| Atorvastatin Calcium | 283 | 90 |
| Amlodipine Besylate | 268 | 80 |
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 208 | 45 |
| Gabapentin | 200 | 42 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$70 across 4 records (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
Registry dates
- Enumerated
- 2006-06-20
- Last updated
- 2009-06-16
Frequently asked questions
- What is Walter Maier's NPI number?
- Walter Maier's National Provider Identifier (NPI) is 1235175233, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Walter Maier's specialty?
- Walter Maier is listed in the NPPES registry with a primary specialty of Preventive Medicine/Occupational Environmental Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Walter Maier located?
- Walter Maier's practice location on file with NPPES is 29099 Hospital Road, Lake Arrowhead, CA 92352.
- What is Walter Maier's phone number?
- The practice phone number listed in the NPPES registry for Walter Maier is (909) 337-3661.
- Does Walter Maier accept Medicare?
- Walter Maier is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Walter Maier's NPI active?
- Yes — Walter Maier's NPI (1235175233) is active in the NPPES registry as of the last update on 2009-06-16.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.