Brian Sebastian, MD
Internal Medicine Physician · Sonoma, California
NPI: 1184624637
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Too few public reviews
$229
First visit · CPT 99204
$150
Follow-up · CPT 99214
Sonoma
California · 11 visit types priced
What You’d Pay
The negotiated rate is the whole bill for a visit with Dr. Sebastian; there is no separate list price on top. How much of it lands on you depends on which of three situations your plan puts you in.
Visit
Deductible not met
Met, 20% coinsurance
Copay plan
First visit
New patient visit, 45–59 min · CPT: 99204
Follow-up
Follow-up visit, 30–39 min · CPT: 99214
Annual physical
Annual physical, age 18–39 · CPT: 99395
Usually $0: in-network preventive visits are covered in full. Add-ons or a problem discussed during the visit are billed separately.
Coinsurance is shown at 20%, the most common in-network share; yours may be 10–40%. Primary care copays typically run $20–$50. Out-of-network or non-UnitedHealthcare plans will differ.
Not every visit needs an office. The Momentary app is AI primary care with real doctors, $19.99 a month for unlimited visits, prescriptions, lab orders and referrals; less than one $150 follow-up here.
Get the Momentary appNegotiated Rates
A new patient visit (45–59 min, CPT 99204) with Dr. Sebastian has a UnitedHealthcare negotiated rate of $229, 13% below the California median of $262. A routine follow-up (CPT 99214) is $150. These are the in-network prices UnitedHealthcare published for Dr. Sebastian’s own NPI in February 2026; what you owe depends on your plan.
Office visits
Problem-focused appointments, priced by length and complexity. Most routine follow-ups bill as 99213 or 99214.
New patient$105–$284
15–29 min99202
11% below California median ($118)
$105
30–44 min99203
15% below California median ($176)
$151
45–59 min99204
13% below California median ($262)
$229
60–74 min99205
18% below California median ($346)
$284
Follow-up (established patient)$30–$150
Nurse visit99211
14% below California median ($35)
$30
10–19 min99212
30% below California median ($89)
$62
20–29 min99213
26% below California median ($137)
$102
30–39 min99214
23% below California median ($194)
$150
40–54 min99215
49% below California median ($284)
$145
plans $90–$201
Annual physicals and preventive visits
Wellness visits by age band. Covered in full in-network on almost all plans; the rate matters when a problem raised during the physical is billed as a separate visit.
New patient$189
Age 40–6499386
21% below California median ($238)
$189
Established patient$142
Age 18–3999395
24% below California median ($188)
$142
In-office add-ons and telehealth
Billed on top of a visit, plus phone or portal visits.
Billed on top of a visit$26–$36
Vaccine administration, first vaccine90471
$36
Electrocardiogram (ECG) with interpretation93000
$30
Rapid flu test87804
$26
Rapid strep test87880
$26
Hospital and emergency rates
Contract codes that do not apply to an office visit, including hospital, emergency and consult work this doctor may never bill. Shown for completeness.
Hospital, emergency and consult codes$84–$379
Initial hospital care, moderate complexity99222
$184
Initial hospital care, high complexity99223
$271
Subsequent hospital care, moderate complexity99232
$98
Subsequent hospital care, high complexity99233
$140
Hospital discharge, more than 30 minutes99239
$144
Emergency department visit, low complexity99283
$84
Emergency department visit, moderate complexity99284
$157
Emergency department visit, high complexity99285
$230
Critical care, first 30–74 minutes99291
$379
Rates are the median across UnitedHealthcare’s plan files for this doctor and code; where plans pay different amounts the range is shown underneath. The comparison is against the median among doctors listed on this site in the same city (when at least three report the code), otherwise statewide. Position counts every listed doctor in the city, lowest rate first.
Patient Reviews
We could not find enough public reviews of Dr. Sebastian to show a rating. We show ratings once a doctor has at least 5.
California Market
California internal medicine physicians with a published rate for new patient visit (45–59 min), cheapest first, with their public rating alongside. The cheapest and most expensive are always included, plus those priced closest to Dr. Sebastian.
Doctor
New patient visit, 45–59 min
Follow-up
Rating
Laguna Beach4.1 (15)
$221
New patient visit, 45–59 min
$171
follow-up
4.1
15 reviews
Dr. Brian Sebastian, MD this page
$229
New patient visit, 45–59 min
$150
follow-up
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About
Location
Address
651 1ST ST W
SUITE H
Sonoma, CA 95476
Phone
(707) 938-3870Questions
- How much does a first visit with Dr. Sebastian cost?
- Dr. Sebastian's negotiated rate with UnitedHealthcare for a new patient office visit, moderate-complexity decision-making, 45–59 minutes is $229, 13% below the California median of $262. This is the total the insurer and patient pay together; if you have not met your deductible you may owe all of it, and with a copay plan you pay only the copay.
- How much is a follow-up visit with Dr. Sebastian?
- An established patient office visit, moderate-complexity decision-making, 30–39 minutes is $150, 23% below the California median of $194. Most routine primary care follow-ups are billed as 99213 or 99214.
- Does Dr. Sebastian accept UnitedHealthcare?
- These rates were published in UnitedHealthcare's in-network price transparency file in February 2026, which indicates Dr. Sebastian was in at least one UnitedHealthcare network at that time. Networks change and vary by plan, so confirm with the office at (707) 938-3870 before booking.