DR. BRAD AARON ZWAHLEN M.D.
NPI 1508878406
Specialist in Berkeley, CA

Q: What is Brad Zwahlen's NPI number?

The NPI number for Brad Zwahlen is 1508878406. It was assigned to this individual provider in the NPPES registry on August 12, 2006.

Q: What is Brad Zwahlen's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Q: When was this NPI record last updated?

The NPPES record for Brad Zwahlen was last updated on January 8, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since August 12, 2006PECOS EnrolledAccepts Medicare Assignment

84.94/100

CMS Quality Rating

2999 REGENT ST, #225, BERKELEY, CA 94705(510) 704-7760(510) 704-7765 Get Directions Write a Review

NPPES record last updated: January 8, 2014. Verified against the NPPES registry weekly; last sync: October 18, 2026.

On this page

About Dr. Brad Aaron Zwahlen M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. BRAD AARON ZWAHLEN M.D. (NPI 1508878406) is an individual specialist in Berkeley, California, licensed in California (A78633) and active in the NPI registry since August 2006. He is enrolled in Medicare PECOS and is a graduate of Baylor College Of Medicine (1997).

NPPES Registry Identity

NPI1508878406

Entity TypeIndividualMale

Primary Taxonomy174400000X

Provider Legal NameDR. BRAD AARON ZWAHLENCredential: M.D.

Location Address2999 REGENT ST, #225Berkeley, CA 94705-2190

Mailing Address2999 Regent St, #225Berkeley, CA 94705-2190 · (510) 704-7760 · Fax (510) 704-7765

Phone(510) 704-7760

Fax(510) 704-7765

Sole ProprietorNo

Medical School CMSBaylor College Of MedicineGraduated 1997

Enumeration DateAugust 12, 2006

Last NPPES UpdateJanuary 8, 2014

✔ NPI 1508878406 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers

Taxonomy Code174400000X

License✔ Licensed in CA · A78633

Definition

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

2999 REGENT ST, Berkeley, CA 94705

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Other Identifiers 3

Medicaid00A786330CA

Medicare UPINH91256CA

Medicare ID-Type Unspecified00A786330CA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Brad Aaron Zwahlen M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID9931185303

PECOS Enrollment IDI20040625001151

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

Medicare enrollment records show Brad Zwahlen reassigns Medicare billing to 2 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

California Sports And Orthopaedic

4.1 mi

Sports Medicine

25 ORINDA WAY, SUITE 100-A
Orinda, CA 94563

Reassigned Medicare billing, California enrollment
10 clinicians in this Medicare group

NPI 1649433962 (925) 258-9571

Sutter Bay Medical Foundation

4.4 mi

Multi-Specialty

12 CAMINO ENCINAS
Orinda, CA 94563

Reassigned Medicare billing, California enrollment
4,479 clinicians in this Medicare group

NPI 1366898538 (510) 204-8180

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 14

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

330 services53 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

275 services207 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

178 services131 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

110 services110 patients

Aspiration and/or injection of fluid large joint using ultrasound guidance 20611

This procedure involves using ultrasound technology to accurately locate a large joint, usually the knee or shoulder. A needle is then inserted to either extract fluid (aspiration) or inject medication. The ultrasound helps ensure precision and safety.

104 services60 patients

X-ray of knee, 1-2 views 73560

An X-ray of the knee with 1-2 views is a quick, painless test that produces images of the knee bones. It helps identify fractures, infections, or changes in the knee joint. During the procedure, you'll be asked to stay still while the X-ray machine captures the images.

53 services38 patients

X-ray of shoulder, minimum of 2 views 73030

An X-ray of the shoulder, with a minimum of 2 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of your shoulder bones. This helps in diagnosing conditions like fractures, arthritis, or other abnormalities. The procedure is quick and painless.

36 services35 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

33 services33 patients

X-ray of both knees while standing 73565

An X-ray of both knees while standing is a diagnostic procedure that captures images of your knee joints. You'll stand in front of an X-ray machine, and it will take pictures showing the bones and tissues in your knees. This helps doctors identify any abnormalities or injuries.

24 services24 patients

Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes 97110

This therapy involves exercises to boost strength, endurance, flexibility, and range of motion. Each session lasts 15 minutes. The goal is to improve physical function and overall health. It's a safe, beneficial method for enhancing well-being and fitness.

22 services22 patients

X-ray of hip, 1 view 73501

An X-ray of the hip, 1 view, is a quick, painless test where a small amount of radiation is used to produce images of the hip joint. This helps in diagnosing conditions like arthritis or fractures. You'll be positioned so that the X-ray machine can capture the best image of your hip.

15 services15 patients

Removal of both knee cartilages using an endoscope 29880

This procedure, also known as bilateral knee arthroscopy, involves using a small camera (endoscope) to view and remove damaged cartilage from both knees. It's a minimally invasive surgery aimed at relieving pain and improving mobility.

14 services14 patients

X-ray of knee, 3 views 73562

An X-ray of the knee, 3 views, is a non-invasive imaging test. It uses a small amount of radiation to produce images of the knee from three different angles. This helps medical professionals to diagnose and monitor conditions like arthritis, fractures, or infections. The process is quick and painless.

13 services13 patients

Replacement of knee joint, both sides of knee 27447

A bilateral knee joint replacement is a procedure where the damaged parts of both your knee joints are replaced with artificial parts. It aims to relieve pain and improve mobility. The process involves a surgical operation under anesthesia.

12 services12 patients

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

84.94/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Quality

78.57

Promoting Interoperability

Improvement Activities

Cost

72.06

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

WILLIAMTENNANTDDS/WILLIAMGIANNIDDS

Dentist (General Practice)

2999 REGENT ST, SUITE 714
BERKELEY, CA 94705

Alameda County (510) 848-3143

DR. GORDON TANG M.D.

Neurological Surgery

2999 REGENT ST, SUITE 715
BERKELEY, CA 94705

Alameda County (510) 841-8700

DR. WARREN I DOTZ M.D.

Dermatology

2999 REGENT ST, SUITE 300
BERKELEY, CA 94705

Alameda County (510) 540-5010

EAST BAY NEUROSURGERY AND SPINE, A MEDICAL CORPORATION

Neurological Surgery

2999 REGENT ST, SUITE 715
BERKELEY, CA 94705

Alameda County (510) 841-8700

DAVID L CUMMINS MD

Orthopaedic Surgery

2999 REGENT ST, 225
BERKELEY, CA 94705

Alameda County (510) 704-7760

DR. JUDY SCHWARTZ MD

Psychiatry & Neurology (Psychiatry)

2999 REGENT ST, SUITE 512
BERKELEY, CA 94705

Alameda County (510) 644-0555

AMY M. HUIBONHOA, M.D. ,INC

Preferred Provider Organization

2999 REGENT ST, SUITE 201
BERKELEY, CA 94705

Alameda County (510) 204-0971

DR. KARIN SCHIFFMAN M.D.

Pediatrics

2999 REGENT ST, SUITE 524
BERKELEY, CA 94705

Alameda County (510) 845-0300

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Brad Zwahlen's NPI number?

The NPI number for Brad Zwahlen is 1508878406. It was assigned to this individual provider in the NPPES registry on August 12, 2006.

Where is Brad Zwahlen located?

Brad Zwahlen practices at 2999 Regent St #225, Berkeley, CA 94705. The listed phone number is (510) 704-7760.

What is Brad Zwahlen's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Brad Zwahlen enrolled in Medicare?

Yes. Brad Zwahlen is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Brad Zwahlen's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Brad Zwahlen reassigns Medicare benefits to 2 organizations: California Sports And Orthopaedic (Orinda, CA) and Sutter Bay Medical Foundation (Orinda, CA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Brad Zwahlen's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Brad Zwahlen was last updated on January 8, 2014. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 12 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.