Brian David Johnston, PA
- Medicare services, 2024
- 188
- Medicare patients, 2024
- 178
- Part D claims, 2024
- 334
- Affiliated sites
- 3
- Medical group
- 1
- Practice address
- 701 E. El Camino Real, 1 Northwest, Mountain View, CA 94040
- Practice phone
- Call (408) 739-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Surgery Center Mountain View
Surgery Center - Medicare-Certified · Mountain View, California
Find Brian Johnston'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.
Brian David Johnston is a physician assistant in Mountain View, California
Brian Johnston practices at Surgery Center Mountain View in Mountain View, California.
Brian Johnston's NPI, 1508269192, was assigned on September 26, 2014. Brian Johnston holds California license 51974.
- NPI
- 1508269192NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9537446638
- NPI enumeration date
- September 26, 2014
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (408) 739-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Brian David Johnston practices at Surgery Center Mountain View in Mountain View, California
Brian Johnston's primary practice is Surgery Center Mountain View, at 701 E. El Camino Real, 1 Northwest, Mountain View, CA 94040. The practice phone is (408) 739-6000.
- Surgery Center Mountain View701 E. El Camino Real, 1 Northwest, Mountain View, CA 94040Phone(408) 739-6000
Source: Dmand AI Affiliation Data
Brian David Johnston is affiliated with 3 sites of care and 1 medical group
Brian Johnston's primary practice is Surgery Center Mountain View in Mountain View, California. The medical group on file is Palo Alto Foundation Medical Group. Dmand AI also links Brian Johnston to 1 more group practice or clinic and 1 home health agency, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Brian David Johnston's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Brian Johnston practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Surgery Center Mountain View | Available with a free account |
| +2 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Brian David Johnston is one of 11,482 physician assistants in California
Physician assistant is Brian Johnston's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Brian Johnston is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA). Brian Johnston is licensed in California.
Specialties and state licenses
- Physician assistant, CaliforniaPrimary
Clinical focus
Dmand AI lists acute sinusitis, adjustment disease, ankle or foot injury, conjunctivitis, contact dermatitis, fluid and electrolyte imbalances, itchy rashes and lower back pain among the conditions Brian Johnston treats.
Physician assistants near Brian Johnston
Counts of physician assistants 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
Brian David Johnston billed Medicare for 188 services in 2024
CMS data shows 188 Medicare services from Brian Johnston across 4 procedure codes in 2024, all of them office visits, for 178 Medicare patients. Medicare paid $15,421 for them. Every service was in an office.
Brian Johnston compared with the California median for physician assistants, 2024
- Brian Johnston
- California median
- Medicare services
- 188vs 2048% below
- Medicare patients
- 178vs 10570% above
- Part D claims
- 93vs 24362% below
Medians across 7,065 physician assistants in California with Dmand AI profiles that report each measure.
Brian Johnston'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Brian David Johnston treated 178 Medicare patients in 2024, average age 75
CMS counts 178 Medicare patients who saw Brian Johnston in 2024. The largest group is 65 to 74, with 79 patients. 75% of them have high cholesterol, and 70% have high blood pressure. 9% are also on Medicaid. Their average risk score is 0.88, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Brian Johnston's median patient age at 53, with 48% women.
Brian Johnston's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Brian Johnston's Medicare patients by sex, 2024
- Women11062%
- Men6838%
Chronic conditions among Brian Johnston's Medicare patients, 2024
- High cholesterol75%
- High blood pressure70%
- Arthritis40%
- Diabetes21%
- Ischemic heart disease21%
- Chronic kidney disease19%
- Osteoporosis19%
- Mood disorders18%
Share of Medicare patients with each condition. A patient can have several.
Brian Johnston's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 53
Patient panel by sex, all payers
- Women48%
- Men51%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Brian David Johnston wrote 334 Medicare Part D claims in 2024
In 2024, Brian Johnston wrote 334 Medicare Part D claims for 149 patients. 76% of them were for generic drugs. CMS names the drug for 93 of them, across 5 drugs with 11 or more claims each, at $2,333 in total drug cost.
Brian Johnston's Part D claims by kind of drug, 2024
- Generic254 claims76%
- Brand-name and other80 claims24%
Brian Johnston'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 Brian Johnston's Part D claims, 2024
- Antibiotics16%54 of 334 claims
- Antipsychotics, patients 65 and over4%13 of 334 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
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
Brian David Johnston offers telehealth to Medicare patients
Brian Johnston accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Brian Johnston as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Brian David Johnston is board certified in certified physician assistant
- Board certified in certified physician assistant
Source: Dmand AI Professional Profile Data
Sources for Brian David Johnston'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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 |
| 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 Brian David Johnston
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Brian David Johnston's NPI number?
Brian David Johnston's NPI number is 1508269192. It was assigned on September 26, 2014, and it is active in the NPI Registry.
What does Brian David Johnston specialize in?
Brian David Johnston is a physician assistant in Mountain View, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Brian David Johnston practice?
Brian Johnston practices at 701 E. El Camino Real, 1 Northwest, Mountain View, CA 94040. Brian Johnston's primary practice is Surgery Center Mountain View in Mountain View, California. Dmand AI also links Brian Johnston to 1 group practice or clinic and 1 home health agency.
What is Brian David Johnston's office phone number?
The practice phone on file for Brian Johnston is (408) 739-6000.
What is Brian David Johnston's medical license number?
Brian Johnston holds California license 51974.
What medical group is Brian David Johnston part of?
Brian Johnston is linked to Palo Alto Foundation Medical Group.
Does Brian David Johnston accept Medicare?
Yes. CMS data shows Brian Johnston billed Medicare for 188 services in 2024, and Brian Johnston accepts Medicare assignment.
Does Brian David Johnston offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Brian Johnston as offering telehealth services.
How many Medicare patients does Brian David Johnston see?
CMS counts 178 Medicare patients who saw Brian Johnston in 2024, with an average age of 75.
Is Brian David Johnston board certified?
Yes. Brian Johnston is board certified in certified physician assistant by the National Commission on Certification of Physician Assistants (NCCPA).
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What services does Brian David Johnston bill to Medicare?
In 2024, Brian Johnston's most billed Medicare services were office visit, established patient (99214), office visit, established patient (99213) and office visit, new patient (99204).
What drugs does Brian David Johnston prescribe most?
In 2024 Medicare Part D data, Brian Johnston's most prescribed drugs by claims were Levothyroxine Sodium, Paxlovid and Azithromycin.
How long has Brian David Johnston been practicing?
Brian Johnston graduated from medical school in 2014, 12 years ago.
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