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Edit this profileWhere to find Gregory S. Canfield, M.D., PhD
- San Luis Obispo location main office
1428 Phillips Ln Ste 203, San Luis Obispo, CA 93401 - San Luis Obispo location
1551 Bishop St Ste 250, San Luis Obispo, CA 93401
About Dr. Canfield
Based in San Luis Obispo, CA, Gregory S. Canfield, M.D., PhD is listed in the NPI registry under infectious disease. Gregory is also listed as specializing in internal medicine and critical care medicine. Medicare claims data shows Gregory provided 464 services to 297 patients. The services billed most often include critical care, first 30-74 minutes, subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes, and critical care, each additional 30 minutes. NPI 1144632159 identifies this record in the national registry.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (805) 543-4407
- Email not available
Practice Locations
1428 PHILLIPS LN STE 203
San Luis Obispo, CA 93401
1551 Bishop St Ste 250
San Luis Obispo, CA 93401
Conditions Commonly Evaluated or Treated
Within Infectious Disease generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Most searched conditions
- Hepatitis C
- HIV
- Long COVID
- Lyme disease
- Recurrent MRSA
- Travel medicine
Bacterial infections
- C. diff Infection
- Cat Scratch Fever
- Drug-Resistant Bacterial Infection
- Flesh-Eating Infection
- NTM lung infection
- Recurrent bacterial vaginosis
- Tick-Borne Infection
- Tuberculosis
Bones & joints
Cardiovascular
- Central Line Infection
- Infective endocarditis
- Pacemaker Infection
Digestive infections
- Salmonella food poisoning
Fungal infections
- Aspergillosis mold infection
- Chronic Yeast Infection
- Cryptococcal fungal infection
- Fungal lung infection
- Fungal sinus infection
- Valley fever
General symptoms
- Frequent Infections
- High fever
- Sepsis Recovery
Neurological infections
Parasitic infections
- Malaria
- Parasite Infection
- Toxoplasmosis
Post-infection conditions
Respiratory infections
Sexually transmitted infections
Skin & soft tissue
- Cellulitis
- Diabetic Foot Infection
- Dog or Animal Bite Infection
- Non-Healing Wound Infection
- Post-surgery fever or infection
- Skin and soft-tissue abscess
Travel-related infections
- Dengue fever
- Typhoid fever
- Zika virus
Urinary tract
Viral infections
- Chronic Epstein-Barr virus reactivation
- Cytomegalovirus
- Hepatitis B
- Mononucleosis
- Mpox
- Shingles
- West Nile virus
Procedures & services
Most searched procedures
- IV antibiotic management
- PrEP prescription
- Travel vaccines
Allergy & immunology
Allergy & Pharmacology
- Antibiotic allergy desensitization
Antiviral treatments
- Antiviral medication management
- Hepatitis C antiviral treatment
- Mpox antiviral treatment
Consultation & second opinions
- Diabetic Foot Ulcer Debridement Consultation
- Infection Screening Before Biologics
- Post-Travel Illness Workup
- Pre-Chemotherapy Infection Clearance
- Pre-Transplant Infection Screening
- Prosthetic Hardware Infection Evaluation
- Second Opinion on Antibiotic Treatment
Diagnostic evaluations
- Chronic viral fatigue evaluation
- Medical parasite clearance evaluation
- Post-sepsis syndrome evaluation
- Sinus infection culture evaluation
- Unexplained fever workup
Diagnostics & screening
- Blood Culture Workup
- Fungal Blood Testing
- Immune System Workup for Frequent Infections
- Joint injection or aspiration
- Spinal Tap Infection Analysis
- Stool Parasite Testing
- TB Skin Test
- Tuberculosis Blood Test
- Wound Culture and Sensitivity
Gastrointestinal treatments
Infusions & Medications
- IV Antibiotic Home Monitoring
- Long-term suppressive antibiotic therapy
Lab testing & monitoring
- Comprehensive STI screening panel
- HIV viral load monitoring
- Infectious diarrhea stool pathogen PCR panel
- Mold and environmental fungal testing
- Specialized Lyme disease confirmation testing
- Tropical disease blood work
Medication management
- Atypical Mycobacteria Treatment Plan
- Chronic Hepatitis B Medication Management
- Infected Central Line Removal Coordination
- Malaria Treatment
- Oral Antibiotic Step-Down Therapy
- Recurrent Shingles Suppression
- Syphilis Injections
- Systemic Antifungal Therapy
Prevention & Prophylaxis
- Doxy-PEP prescription
Prevention & prophylaxis
- Emergency HIV Prevention (PEP)
- Needlestick Injury Evaluation
- Rabies Post-Exposure Shots
- Tick Bite Evaluation
Travel medicine
- International travel health consultation
- Yellow fever vaccine consultation
Procedures Most Often Billed to Medicare
464 services · 297 patients · 6 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of non-tunneled central venous tube for infusion (5 years or older) | Procedure | 36556 |
17 | Too few peers to compare |
| Insertion of artery tube for blood sampling or infusion through skin | Procedure | 36620 |
16 | Too few peers to compare |
| Ultrasonic guidance for blood vessel access | Imaging | 76937 |
37 | Too few peers to compare |
| Critical care, first 30-74 minutes | Office visit | 99291 |
276 | More than most peers in Infectious Disease |
| Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes | Office visit | 99233 |
70 | As often as other peers in Infectious Disease |
| Critical care, each additional 30 minutes | Office visit | 99292 |
48 | Too few peers to compare |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
Other infectious disease specialists in San Luis Obispo 3
Same specialty, same city.
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
More connections — 9 related providers in 2 groups
Class of 2014 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of non-tunneled central venous tube for infusion (5 years or older) 1
Providers in CA who bill this service to Medicare most often.
Common questions
What is Gregory S. Canfield, M.D.'s specialty?
Gregory S. Canfield, M.D. is an infectious disease specialist in San Luis Obispo, CA. That is the designation recorded for this NPI in the federal registry, where it is listed as “Infectious Disease”.
NPI registry
Where can I find Gregory S. Canfield, M.D.?
Gregory S. Canfield, M.D. is listed at 1428 Phillips Ln Ste 203, San Luis Obispo, CA 93401. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How do I contact Gregory S. Canfield, M.D.?
The number on file is (805) 543-4407. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Gregory S. Canfield, M.D.?
Gregory S. Canfield, M.D.'s National Provider Identifier is 1144632159. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
What is Gregory S. Canfield, M.D.'s education?
Gregory S. Canfield, M.D. attended Other, graduating in 2014. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Gregory S. Canfield, M.D. have?
Gregory S. Canfield, M.D. has 12 years experience. Calculated from a graduation year of 2014, reported in the CMS National Downloadable File.
CMS public data
What is Gregory S. Canfield, M.D. known for?
According to Medicare billing data, Gregory S. Canfield, M.D. performs procedures including insertion of non-tunneled central venous tube for infusion and insertion of artery tube for blood sampling or infusion through skin; reads or performs imaging such as ultrasonic guidance for blood vessel access, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Gregory S. Canfield, M.D.'s profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Gregory S. Canfield, M.D.. If this is you, claiming it is free.
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