Dr. Matthew E. Guest, MD
- Medicare services, 2024
- 17
- Medicare patients, 2024
- 20
- Part D claims, 2024
- 9,446
- Hospital affiliations
- 1
- Medical group
- 1
- Practice address
- 9455 Clairemont Mesa Blvd, San Diego, CA 92123
- Practice phone
- Call (619) 528-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Kaiser Permanente San Diego Medical Center
San Diego, California
Find Dr. Guest's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Matthew E. Guest is an internist in San Diego, California
Dr. Guest practices at Kaiser Permanente San Diego Medical Center in San Diego, California.
Dr. Guest's NPI, 1023038601, was assigned on July 19, 2006. Dr. Guest graduated from Jacobs School of Medicine and Biomedical Sciences in 2003. Dr. Guest holds California license A91381.
- NPI
- 1023038601NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8426052598
- NPI enumeration date
- July 19, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (619) 528-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Matthew E. Guest practices at Kaiser Permanente San Diego Medical Center in San Diego, California
Dr. Guest's primary practice is Kaiser Permanente San Diego Medical Center, at 9455 Clairemont Mesa Blvd, San Diego, CA 92123 in San Diego County. The practice phone is (619) 528-5000.
- Kaiser Permanente San Diego Medical Center9455 Clairemont Mesa Blvd, San Diego, CA 92123 · San Diego CountyPhone(619) 528-5000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Matthew E. Guest is affiliated with 2 sites of care and 1 medical group
Dr. Guest's primary practice is Kaiser Permanente San Diego Medical Center in San Diego, California. Dr. Guest is also affiliated with Kaiser Permanente Zion Medical Center. The medical group on file is Southern California Permanente Medical Group.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Matthew E. Guest's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Guest practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Kaiser Permanente San Diego Medical Center | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Matthew E. Guest is one of 16,751 internists in California
Internal medicine is Dr. Guest's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Guest is board certified in family medicine by the American Board of Family Medicine. Dr. Guest is licensed in California.
Specialties and state licenses
- Internal medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists contact dermatitis, corns and calluses and hemorrhoids among the conditions Dr. Guest treats.
Internists near Dr. Guest
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Matthew E. Guest billed Medicare for 17 services in 2024
CMS data shows 17 Medicare services from Dr. Guest across 1 procedure code in 2024, all of them office visits, for 20 Medicare patients. Medicare paid $1,365 for them. Every service was in an office.
Dr. Guest's Medicare services by type, 2018 to 2024
- 2018
- 2024
- Office and hospital visits
- 2018: 222024: 1723%
Dr. Guest compared with the California median for internists, 2024
- Dr. Guest
- California median
- Medicare services
- 17vs 36195% below
- Medicare patients
- 20vs 15187% below
- Part D claims
- 8,859vs 42121.0 times
Medians across 15,815 internists in California with Dmand AI profiles that report each measure.
Dr. Guest's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Guest and other internists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Matthew E. Guest treated 20 Medicare patients in 2024, average age 68
CMS counts 20 Medicare patients who saw Dr. Guest in 2024. Their average risk score is 1.14, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Guest's median patient age at 59, with 57% women.
Dr. Guest's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women57%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Matthew E. Guest wrote 9,446 Medicare Part D claims in 2024
In 2024, Dr. Guest wrote 9,446 Medicare Part D claims for 1,090 patients. 89% of them were for generic drugs. CMS names the drug for 8,859 of them, across 126 drugs with 11 or more claims each, at $518,688 in total drug cost. In 2023, CMS named 8,491 claims across 122 drugs.
Dr. Guest's Part D claims by kind of drug, 2024
- Generic8,371 claims89%
- Brand-name974 claims10%
- Other101 claims1%
Dr. Guest's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Guest's Part D claims, 2024
- Opioids5%461 of 9,446 claims
- Antibiotics2%182 of 9,446 claims
- Antipsychotics, patients 65 and over0%32 of 9,446 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 8,4912024: 8,8594%
Drugs named by CMS: 126 in 2024, 122 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Matthew E. Guest offers telehealth to Medicare patients
Dr. Guest accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Guest as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Matthew E. Guest graduated from Jacobs School of Medicine and Biomedical Sciences
Dr. Guest graduated from Jacobs School of Medicine and Biomedical Sciences in 2003.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. Matthew E. Guest accepts plans from 2 insurance carriers
Dr. Guest is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Guest accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Matthew E. Guest's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Matthew E. Guest
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Matthew E. Guest's NPI number?
Dr. Matthew E. Guest's NPI number is 1023038601. It was assigned on July 19, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Matthew E. Guest?
Dr. Matthew E. Guest is an internist in San Diego, California. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Matthew E. Guest practice?
Dr. Guest practices at 9455 Clairemont Mesa Blvd, San Diego, CA 92123. Dr. Guest's primary practice is Kaiser Permanente San Diego Medical Center in San Diego, California.
What is Dr. Matthew E. Guest's office phone number?
The practice phone on file for Dr. Guest is (619) 528-5000.
What is Dr. Matthew E. Guest's medical license number?
Dr. Guest holds California license A91381.
Which hospitals is Dr. Matthew E. Guest affiliated with?
Dr. Guest is affiliated with Kaiser Permanente Zion Medical Center.
What medical group is Dr. Matthew E. Guest part of?
Dr. Guest is linked to Southern California Permanente Medical Group.
Does Dr. Matthew E. Guest accept Medicare?
Yes. CMS data shows Dr. Guest billed Medicare for 17 services in 2024, and Dr. Guest accepts Medicare assignment.
Does Dr. Matthew E. Guest offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Guest as offering telehealth services.
How many Medicare patients does Dr. Matthew E. Guest see?
CMS counts 20 Medicare patients who saw Dr. Guest in 2024, with an average age of 68.
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Is Dr. Matthew E. Guest board certified?
Yes. Dr. Guest is board certified in family medicine by the American Board of Family Medicine.
What services does Dr. Matthew E. Guest bill to Medicare?
In 2024, Dr. Guest's most billed Medicare services were office visit, established patient (99214).
Where did Dr. Matthew E. Guest go to medical school?
Dr. Guest graduated from Jacobs School of Medicine and Biomedical Sciences in 2003.
What drugs does Dr. Matthew E. Guest prescribe most?
In 2024 Medicare Part D data, Dr. Guest's most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Losartan Potassium.
How long has Dr. Matthew E. Guest been practicing?
Dr. Guest graduated from medical school in 2003, 23 years ago.
What insurance does Dr. Matthew E. Guest accept?
Dr. Guest is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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