Active NPI 1508878406 Individual Practitioner Male Practitioner

Dr. Brad Aaron Zwahlen , MD

Specialist • Berkeley, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Brad Zwahlen, MD is a certified Specialist practicing in Berkeley, CA. With approximately 29 years of clinical experience since graduating from Baylor College Of Medicine in 1997, Dr. Zwahlen delivers high-quality medical care to the local community at 2999 REGENT ST.

Dr. Zwahlen maintains professional affiliations with Sutter Bay Medical Foundation, California Sports And Orthopaedic and accepts Medicare assignment.

Frequently performed procedures and clinical services include injection, triamcinolone acetonide, not otherwise specified, 10 mg, established patient outpatient office visit, new patient outpatient office visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

2999 Regent St
#225

Berkeley, CA 947052190

Telephone 5107047760

Fax 5107047765

Associated Practice Facility / Clinic

🏢 East Bay Neurosurgery And Spine, A Medical Corporation Facility NPI 1104895846

Medicare Profile & Education

Medical School

Baylor College Of Medicine

Graduation Year

1997

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Specialist in Berkeley, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

29 Yrs -5.0 yrs vs City Avg

City Avg: 34.0 Yrs

State Avg: 38.0 Yrs

Regional Practice Density

46 Specialists

Practicing in Berkeley, CA (6446 Statewide)

Telehealth Adoption Rate

0.0% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

64.5% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Zwahlen (29 Years) 29 Yrs

Berkeley Specialty Average (34.0 Years) 34.0 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	330	53	$10.00	$0.96
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	275	207	$250.00	$154.12
99213 Established patient office or other outpatient visit, typically 15 minutes	178	131	$165.00	$109.92
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	110	110	$384.00	$198.33
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	104	60	$327.40	$133.96
73560 X-ray of knee, 1-2 views	53	38	$85.00	$45.70
73030 X-ray of shoulder, minimum of 2 views	36	35	$91.00	$46.42
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	33	33	$267.00	$133.94
73565 X-ray of both knees while standing	24	24	$82.00	$53.55
97110 Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes	22	22	$76.00	$35.88
73501 X-ray of hip with pelvis, 1 view	15	15	$100.00	$43.68
29880 Removal of both knee cartilages using an endoscope	14	14	$2024.00	$670.24
73562 X-ray of knee, 3 views	13	13	$92.00	$54.86
27447 Replacement of knee joint, both sides of knee	12	12	$4893.00	$1457.44

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	460	59	$10.00	$1.07
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	311	224	$250.00	$150.61
99213 Established patient office or other outpatient visit, typically 15 minutes	188	137	$165.00	$107.18
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	136	68	$339.71	$135.81
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	125	125	$384.00	$194.04
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	68	68	$267.00	$132.11
73560 X-ray of knee, 1-2 views	57	42	$85.00	$45.10
73030 X-ray of shoulder, minimum of 2 views	51	41	$91.00	$45.28
73565 X-ray of both knees while standing	32	31	$82.00	$52.85
97110 Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes	22	21	$76.00	$35.68
73501 X-ray of hip with pelvis, 1 view	20	20	$100.00	$43.02
73562 X-ray of knee, 3 views	14	14	$92.00	$53.53

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	164	20	$10.00	$1.17
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	139	104	$250.00	$150.35
99213 Established patient office or other outpatient visit, typically 15 minutes	128	92	$165.00	$105.85
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	51	25	$341.18	$137.15
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	37	37	$384.00	$193.13
73560 X-ray of knee, 1-2 views	30	21	$85.00	$44.37
97110 Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes	29	28	$76.00	$35.07
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	29	29	$267.00	$130.91

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	239	44	$10.00	$1.29
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	156	114	$219.00	$153.22
99213 Established patient office or other outpatient visit, typically 15 minutes	153	110	$144.00	$108.42
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	114	50	$327.63	$126.05
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	42	42	$267.00	$132.55
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	24	24	$384.00	$195.98
97110 Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes	15	15	$76.00	$35.78
27447 Replacement of knee joint, both sides of knee	12	12	$4893.00	$1464.95

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J7328 Hyaluronan or derivative, gelsyn-3, for intra-articular injection, 0.1 mg	10,248	16	$2.68	$2.25
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	427	60	$10.00	$1.44
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	235	156	$219.00	$130.29
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	183	79	$332.79	$124.52
99213 Established patient office or other outpatient visit, typically 15 minutes	126	103	$144.00	$90.54
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	46	46	$384.00	$194.07
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	34	34	$267.00	$127.96
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	26	16	$105.00	$55.69
97110 Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes	15	15	$76.00	$37.42

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
J7328 Hyaluronan or derivative, gelsyn-3, for intra-articular injection, 0.1 mg	9,576	11	$2.68	$2.30
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	226	147	$219.00	$126.38
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	174	69	$289.66	$117.24
99213 Established patient office or other outpatient visit, typically 15 minutes	124	92	$144.00	$87.52
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	92	17	$10.00	$1.58
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	59	24	$105.00	$54.23
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	57	57	$267.00	$126.48
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	50	50	$384.00	$189.78
J1040 Injection, methylprednisolone acetate, 80 mg	49	40	$60.00	$12.13
97535 Training for self-care or home management, each 15 minutes	29	28	$60.00	$40.99
29876 Removal of joint lining from multiple knee joint compartments using an endoscope	12	12	$1923.00	$753.30

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	291	185	$219.57	$121.83
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	169	64	$289.35	$113.50
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	132	19	$10.00	$1.83
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	80	80	$384.00	$182.85
99213 Established patient office or other outpatient visit, typically 15 minutes	74	42	$144.00	$82.67
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	55	23	$105.00	$50.71
J1040 Injection, methylprednisolone acetate, 80 mg	49	36	$60.00	$13.01
97535 Training for self-care or home management, each 15 minutes	39	39	$60.00	$39.89
J1030 Injection, methylprednisolone acetate, 40 mg	19	12	$40.00	$6.66
73562 X-ray of knee, 3 views	18	15	$26.22	$12.19
73721 Mri scan of leg joint without contrast	17	17	$150.00	$73.87
73502 X-ray of hip, 2-3 views	16	16	$40.63	$12.27
73221 Mri scan of arm joint without contrast	14	14	$150.00	$73.91
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	13	13	$267.00	$121.06
29876 Removal of joint lining from multiple knee joint compartments using an endoscope	11	11	$1923.00	$725.14

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	353	180	$217.67	$123.55
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg	162	25	$7.74	$1.84
20611 Aspiration and/or injection of fluid large joint using ultrasound guidance	122	53	$285.25	$105.99
76881 Complete ultrasound of joint of arm or leg	95	49	$300.00	$147.32
J1030 Injection, methylprednisolone acetate, 40 mg	47	27	$40.00	$5.45
97535 Training for self-care or home management, each 15 minutes	43	43	$60.00	$41.02
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	38	38	$361.47	$185.56
J1885 Injection, ketorolac tromethamine, per 15 mg	25	11	$6.88	$0.58
73721 Mri scan of leg joint without contrast	22	22	$150.45	$75.57
73562 X-ray of knee, 3 views	18	17	$25.00	$10.60
97110 Therapy procedure using exercise to develop strength, endurance, range of motion, and flexibility, each 15 minutes	16	16	$75.50	$31.41
73502 X-ray of hip, 2-3 views	16	16	$25.00	$12.57
27447 Replacement of knee joint, both sides of knee	14	13	$4084.36	$1499.04
73564 X-ray of knee, 4 or more views	11	11	$25.00	$12.57

Medical Specialties & State Licenses

Specialist Primary Specialty

NUCC Taxonomy Code: 174400000X

State License CA A78633

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.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

00A786330 (CA)

Hospital & Practice Group Affiliations

Sutter Bay Medical Foundation

3200 Kearney St, Fremont, CA 945382299

Phone: 5104901222

Sutter Bay Medical Foundation

2450 Ashby Ave, Berkeley, CA 947052067

Phone: 5102044444

California Sports And Orthopaedic

2999 Regent St, Berkeley, CA 947052117

Phone: 5107047760

Sutter Bay Medical Foundation

795 El Camino Real, Palo Alto, CA 943012302

Phone: 4156001020

Sutter Bay Medical Foundation

2999 Regent St, Berkeley, CA 947052118

Phone: 5102048120

Sutter Bay Medical Foundation

2450 Ashby Ave, Berkeley, CA 947052067

Phone: 5102044444

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

12 Associated Practitioners

Andrew Simpkins , ATC

Specialist/Technologist - Athletic Trainer

NPI 1033535257

Certified Athletic Trainer

Dr. David Cummins , MD

Orthopaedic Surgery

NPI 1114031945

Doctor of Medicine (M.D.)

Gaye Derusso , PA

Physician Assistant - Surgical

NPI 1184658783

Physician Assistant

Dr. Robert Eppley , MD

Orthopaedic Surgery

NPI 1497784888

Doctor of Medicine (M.D.)

Melissa Chancellor , PA-C

Physician Assistant

NPI 1518183573

Physician Assistant (Certified)

Dr. O Mckinley , MD

Orthopaedic Surgery

NPI 1558474460

Doctor of Medicine (M.D.)

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events

✅

NPI Profile Active January 08, 2014

NPI status registered as active in NPPES database

📍

Updated Practice Location January 08, 2014

Registered at 2999 REGENT ST, #225, BERKELEY, CA 947052190 (Tel: 5107047760)

📍

Updated Business Mailing Address January 08, 2014

Registered at 2999 REGENT ST, #225, BERKELEY, CA 947052190 (Tel: 5107047760)

👤

Provider Name / Credentials Updated January 08, 2014

Recorded as BRAD ZWAHLEN, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) January 08, 2014

Specialist (License #A78633 in CA)

🟢

Initial NPI Registration & Enumeration August 12, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1508878406

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: August 12, 2006

Last Update: January 08, 2014

Sole Proprietor: No

Update or Correct Profile

Mailing Address

2999 Regent St, #225

Berkeley, CA 947052190

Phone: 5107047760

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.