Warren Zager, M.D.
NPI 1316900897 · Otolaryngology Physician · Norristown, PA
Enrolled with Medicare as Practitioner - Otolaryngology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Warren Zager, M.D. is a Otolaryngology Physician provider in Norristown, PA (NPI 1316900897).
Provider details
- NPI number
- 1316900897
- Entity type
- Individual
- Primary specialty
- Otolaryngology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- MD-071488L (PA)
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
20 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
2,170 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 438 | $97 |
| Test for Allergy Using Allergenic Extract95004 | 362 | $4 |
| Diagnostic Exam of Nasal Passages Using an Endoscope31231 | 350 | $202 |
| Test for Allergy Using Allergenic Extract Injected Into Skin95024 | 342 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 209 | $137 |
| Diagnostic Exam of Voice Box Using a Flexible Endoscope31575 | 160 | $139 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 13 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Famotidine | 214 | 80 |
| Ipratropium Bromide | 212 | 81 |
| Pantoprazole Sodium | 105 | 48 |
| Fluticasone Propionate | 75 | 27 |
| Montelukast Sodium | 68 | 21 |
| Triamterene/Hydrochlorothiazidbrand: Triamterene-Hydrochlorothiazid | 35 | 12 |
| Prednisone | 32 | 30 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-04-07
- Last updated
- 2008-04-29
Frequently asked questions
- What is Warren Zager's NPI number?
- Warren Zager's National Provider Identifier (NPI) is 1316900897, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Warren Zager's specialty?
- Warren Zager is listed in the NPPES registry with a primary specialty of Otolaryngology Physician (Allopathic & Osteopathic Physicians).
- Where is Warren Zager located?
- Warren Zager's practice location on file with NPPES is 306 W Logan St, Norristown, PA 19401-2935.
- What is Warren Zager's phone number?
- The practice phone number listed in the NPPES registry for Warren Zager is (610) 275-6153.
- Does Warren Zager accept Medicare?
- Warren Zager is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Warren Zager's NPI active?
- Yes — Warren Zager's NPI (1316900897) is active in the NPPES registry as of the last update on 2008-04-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.