BRYAN DIEFFENBACH M.D.
NPI 1326466137
Surgery - Vascular Surgery in San Diego, CA

Q: What is Bryan Dieffenbach's NPI number?

The NPI number for Bryan Dieffenbach is 1326466137. It was assigned to this individual provider in the NPPES registry on March 31, 2014.

Q: What is Bryan Dieffenbach's specialty?

The primary specialty registered for this NPI is Surgery, specializing in Vascular Surgery, with taxonomy code 2086S0129X.

Q: When was this NPI record last updated?

The NPPES record for Bryan Dieffenbach was last updated on May 14, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 14 months 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 March 31, 2014PECOS EnrolledAccepts Medicare Assignment

550 WASHINGTON ST STE 641, SAN DIEGO, CA 92103(619) 299-2600(619) 299-3923 Get Directions Write a Review

NPPES record last updated: May 14, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

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About Bryan Dieffenbach M.d. NPPES

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

BRYAN DIEFFENBACH M.D. (NPI 1326466137) is an individual vascular surgery provider in San Diego, California, licensed in California (A188066) and active in the NPI registry since March 2014. He is enrolled in Medicare PECOS, maintains 3 additional practice locations, and is a graduate of University Of California, San Diego School Of Medicine (2014).

NPPES Registry Identity

NPI1326466137

Entity TypeIndividualMale

Primary Taxonomy2086S0129X

Provider Legal NameBRYAN DIEFFENBACHCredential: M.D.

Location Address550 WASHINGTON ST STE 641San Diego, CA 92103-2229

Mailing Address550 Washington St Ste 641San Diego, CA 92103-2229 · (619) 299-2600 · Fax (619) 299-3923

Phone(619) 299-2600

Fax(619) 299-3923

Sole ProprietorYes

Medical School CMSUniversity Of California, San Diego School Of MedicineGraduated 2014

Enumeration DateMarch 31, 2014

Last NPPES UpdateMay 14, 2025

NPPES CertifiedMay 14, 2025

✔ NPI 1326466137 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySurgery · Vascular SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code2086S0129X

License✔ Licensed in CA · A188066

Definition

A surgeon with expertise in the management of surgical disorders of the blood vessels, excluding the intracranial vessels or the heart.

550 WASHINGTON ST STE 641, San Diego, CA 92103

Open in Google Maps ↗

Secondary Practice Locations 3

Location 16655 Alvarado RdSan Diego, CA 92120-5208 · Phone (800) 926-8273

Location 29300 Campus Point DrLA Jolla, CA 92037-1300 · Phone (800) 926-8273

Location 3200 W Arbor DrSan Diego, CA 92103-9000 · Phone (800) 926-8273

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Bryan Dieffenbach 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 ID2961866272

PECOS Enrollment IDI20230919002984

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.

Areas of Expertise CMS Part B claims 8

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.

Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes 99232

Follow-up hospital inpatient care involves daily check-ups while you're admitted in the hospital. Typically, a healthcare provider spends about 25 minutes each day reviewing your condition, adjusting treatment if needed, and answering any questions you might have.

302 services63 patients

Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes 99223

Initial hospital inpatient care per day, typically 70 minutes, refers to the daily medical service provided to patients admitted to the hospital. This includes a comprehensive evaluation, diagnosis, treatment plan, and monitoring of your health condition. It ensures your well-being during your hospital stay.

67 services62 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.

60 services37 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.

36 services36 patients

Review by radiologist of abdominal aorta image 75625

This is a procedure where a radiologist, a doctor specialized in medical imaging, examines an image of your abdominal aorta. The abdominal aorta is the large blood vessel that carries blood to your lower body. The radiologist checks for any abnormalities to ensure your overall vascular health.

22 services22 patients

Insertion of tube into abdominal, pelvic, or leg artery, initial third order branch 36247

This procedure involves placing a tube into an artery in the abdomen, pelvis, or leg. The tube is inserted into the initial third order branch of the artery. This can help doctors diagnose or treat certain conditions by allowing access to these blood vessels.

19 services17 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 92103 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$94.87 typical visit price

range $62.10 – $184.71

Typical copayment $23.71 (range $15.52 – $46.17)

Most-billed visit code 99203

Established Patient

$76.87 typical visit price

range $20.62 – $151.42

Typical copayment $19.21 (range $5.15 – $37.85)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 9

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

RICHARD I BLUM M.D.

Internal Medicine (Cardiovascular Disease)