Brad Zwahlen, M.D.
NPI 1508878406 · Specialist · Berkeley, CA
Enrolled with Medicare as Practitioner - Orthopedic Surgery · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Brad Zwahlen, M.D. is a Specialist provider in Berkeley, CA (NPI 1508878406).
Provider details
- NPI number
- 1508878406
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- A78633 (CA)
Specialties & taxonomies
Other Service Providers
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
889 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 Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 275 | $154 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 178 | $110 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 110 | $198 |
| Aspiration And/Or Injection of Fluid Large Joint Using Ultrasound Guidance20611 | 104 | $134 |
| X-Ray of Knee, 1-2 Views73560 | 53 | $46 |
| X-Ray of Shoulder, Minimum of 2 Views73030 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Hydrocodone/Acetaminophenbrand: Hydrocodone-Acetaminophen | 81 | 56 |
| Amoxicillin | 30 | 13 |
| Celecoxib | 21 | — |
| Ondansetron Hcl | 15 | 12 |
| Cephalexin | 13 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-12
- Last updated
- 2014-01-08
Frequently asked questions
- What is Brad Zwahlen's NPI number?
- Brad Zwahlen's National Provider Identifier (NPI) is 1508878406, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Brad Zwahlen's specialty?
- Brad Zwahlen is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Brad Zwahlen located?
- Brad Zwahlen's practice location on file with NPPES is 2999 Regent St, Berkeley, CA 94705-2190.
- What is Brad Zwahlen's phone number?
- The practice phone number listed in the NPPES registry for Brad Zwahlen is (510) 704-7760.
- Does Brad Zwahlen accept Medicare?
- Brad Zwahlen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Brad Zwahlen's NPI active?
- Yes — Brad Zwahlen's NPI (1508878406) is active in the NPPES registry as of the last update on 2014-01-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.