Functional Medicine Index
Verified October 6, 2026

Advanced Functional Medicine, San Diego

MD and NP-led functional medicine practice in San Diego, CA

MD + NPTelehealth
Practice websiteCall (858) 412-5744

Location and hours

Live from Google
Address
5405 Morehouse Drive, Suite 135, San Diego, CA 92121
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Rating, hours and phone shown live from Google Maps. Not part of our score.
Google Map · Directions

At a glance

Advanced Functional Medicine lists MD, NP, ND and DC credentials on its site; of the 21 San Diego practices we list, only 3 name an NP and 6 an MD. It says it offers telehealth and a free 10-minute discovery call, lists Spanish, and names conditions including thyroid issues, menopause, ADHD and digestive disorders.

First visitNot reported
Follow-upsNot reported
Discovery callFree, 10 min
New patientsNot reported
TelehealthYes
Ages seenNot reported
LanguagesSpanish
NPI record since2016

Practitioners

As named on the practice's website.

Matthew Willis, DC, DABCI

FounderDC, DABCI (listed on the practice's site)CA licence · verify with the board

Sonia Mohan, MD

Co-founder, DirectorMD (listed on the practice's site)

Jessica Garcia, PsyD

Doctor of Clinical Psychology | Holistic Health PractitionerPsyD (listed on the practice's site)

Grace Victor, ND

Naturopathic Medical DoctorND (listed on the practice's site)

Stacy Antone, FNP-C

Nurse PractitionerFNP-C (listed on the practice's site)CA licence · verify with the board
Measured · public records

Credentials and licensure

PractitionerNPILicenceStatusLicensed since
Matthew Willis1104275270California Department of Consumer Affairs licence search · R1236930816Verify with the boardNot reported
Stacy Marie Antone, FNP1114517919California Department of Consumer Affairs licence search · NP95015535Verify with the boardNot reported

Sources: NPPES NPI Registry, checked October 6, 2026; California Department of Consumer Affairs licence search: linked for you to verify (not checked by us). IFMCP status is self-reported.

Conditions this practice lists

Autoimmune conditionsWeight & metabolic healthHormone imbalancePerimenopause & menopauseBrain health & cognitionADHD & focusGut health & IBSThyroid & Hashimoto'sAnxietySkin conditionsDepression & moodFatigueDiabetes & blood sugarFertility
All condition guides →

As listed on the practice's website. Listing a condition isn't evidence a treatment works.

Labs and services

Mycotoxin testingHeavy metals testingFood sensitivity testingCortisol / adrenal testingGenetic testingStool testingHRT ServicesHolistic PsychologySupplement StoreHealth coaches

As listed on the practice's website.

How we scored Advanced Functional Medicine

Total 5.2 / 10
  • Credentials & licensure · 25%20 / 25
    2 clinicians matched to NPI records, licence linked to the state board lookup (not checked against open data) and clinicians named with credentials on its site.
  • Transparency on pricing and insurance · 25%0 / 25
    Publishes no prices or insurance details.
  • Access · 25%12 / 25
    Telehealth and free discovery call.
  • Breadth of services · 15%13 / 15
    14 conditions listed, 6 named lab tests and 4 services.
  • Data completeness · 10%6.7 / 10
    8 of 12 key fields verified.

Scores use verified data only. Partner brands can't change a rank or a score. Full methodology

Compare with nearby practices

Dr. Genevieve Price Naturopathic Doctor2.8 out of 10San Diego · 0.3 miNDNourish Medical Center5.0 out of 10San Diego · 1.0 miND · Cash onlyBioMed Health Center6.5 out of 10La Jolla · 1.7 miMD + ND · Superbill

San Diego practices ranked next to Advanced Functional Medicine

See the San Diego rankings →

Pacific Pearl La Jolla5.9 out of 10#8 in San Diego · MD + DO + NP + ND · SuperbillMOSAIC INTEGRATIVE MEDICINE5.2 out of 10#10 in San Diego · ND

Advanced Functional Medicine: common questions

How much is a first visit at Advanced Functional Medicine?

Our data does not include a first-visit fee for Advanced Functional Medicine in San Diego. The practice lists a free, 10 min discovery call. Ask the practice directly for its current first-visit and follow-up fees before you book.

Can I see Advanced Functional Medicine by telehealth?

Yes. Advanced Functional Medicine says it offers telehealth. Our data does not show which states it names for telehealth visits. Matthew Willis and Stacy Marie Antone have California licences listed, but we have not checked their status. Confirm with your state board that the clinician is licensed in the state where you will be during the visit.

Which lab tests does Advanced Functional Medicine offer?

Advanced Functional Medicine names these lab tests on its site: mycotoxin testing, heavy metals testing, food sensitivity testing, cortisol / adrenal testing, genetic testing and stool testing. This list is self-reported from the practice's website. Ask the practice which tests fit your situation and what each one costs.

What does Advanced Functional Medicine treat?

Advanced Functional Medicine lists 14 conditions on its site. Examples include autoimmune disorders, weight loss, hormone issues, menopause, brain fog / cognitive issues, ADHD, digestive disorders and thyroid issues. It also lists HRT services, holistic psychology, a supplement store and health coaches. These are self-reported listings, not outcomes. The practice data was verified in October 2026.

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Sources

  1. NPPES NPI Registry — NPI, credentials, licence numbers and taxonomy
  2. Practice websites — each practice's own website — pricing, insurance, services and conditions (dated per listing)
  3. Google Places API (New) — ratings, hours and phone, shown live and not stored

This profile is for information only and isn't medical advice or an endorsement. Confirm credentials, coverage and costs directly with the practice.