Hilary D. Johnston, MMSC, PA-C
- Part D claims, 2024
- 463
- Affiliated sites
- 1
- Medical groups
- 2
- State license
- 1
- Year NPI issued
- 2016
- Practice address
- 1190 Veterans Blvd, Redwood City, CA 94063
- Practice phone
- Call (650) 299-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Permanente Medical Group Inc
Redwood City, California
Find Hilary 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.
Hilary D. Johnston is a physician assistant in Redwood City, California
Hilary Johnston practices at Permanente Medical Group Inc in Redwood City, California.
Hilary Johnston's NPI, 1649626177, was assigned on May 13, 2016. Hilary Johnston holds California license 53387.
- NPI
- 1649626177NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5890085948
- NPI enumeration date
- May 13, 2016
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (650) 299-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 36
- Medical school graduation
- 2016
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Hilary D. Johnston practices at Permanente Medical Group Inc in Redwood City, California
Hilary Johnston's primary practice is Permanente Medical Group Inc, at 1190 Veterans Blvd, Redwood City, CA 94063 in San Mateo County. The practice phone is (650) 299-2000.
- Permanente Medical Group Inc1190 Veterans Blvd, Redwood City, CA 94063 · San Mateo CountyPhone(650) 299-2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Hilary D. Johnston is affiliated with 2 sites of care and 2 medical groups
Hilary Johnston's primary practice is Permanente Medical Group Inc in Redwood City, California. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Hilary Johnston to 1 more group practice or clinic and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Hilary D. Johnston's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Hilary Johnston practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Permanente Medical Group Inc | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Hilary D. Johnston is one of 2,381 physician assistants in California
Medical is Hilary Johnston's primary specialty in the NPI Registry, under taxonomy code 363AM0700X. Hilary Johnston is licensed in California.
Specialties and state licenses
- Medical physician assistant, CaliforniaPrimary
Physician assistants near Hilary 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
Hilary D. Johnston's patients have a median age of 35
Across all payers, Dmand AI patient panel data puts Hilary Johnston's median patient age at 35, with 53% women.
Hilary 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 35
Patient panel by sex, all payers
- Women53%
- Men43%
Source: Dmand AI Patient Panel Data
Hilary D. Johnston wrote 463 Medicare Part D claims in 2024
In 2024, Hilary Johnston wrote 463 Medicare Part D claims for 153 patients. 84% of them were for generic drugs. CMS names the drug for 348 of them, across 16 drugs with 11 or more claims each, at $126,368 in total drug cost.
Hilary Johnston's Part D claims by kind of drug, 2024
- Generic388 claims84%
- Brand-name75 claims16%
Hilary 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 Hilary Johnston's Part D claims, 2024
- Antibiotics6%26 of 463 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
How Hilary D. Johnston takes part in Medicare
Hilary Johnston accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Sources for Hilary D. 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 | 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 Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| 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) |
| 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 Hilary D. 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 Hilary D. Johnston's NPI number?
Hilary D. Johnston's NPI number is 1649626177. It was assigned on May 13, 2016, and it is active in the NPI Registry.
What does Hilary D. Johnston specialize in?
Hilary D. Johnston is a physician assistant in Redwood City, California. The primary specialty in the NPI Registry is Medical Physician Assistant (taxonomy code 363AM0700X).
Where does Hilary D. Johnston practice?
Hilary Johnston practices at 1190 Veterans Blvd, Redwood City, CA 94063. Hilary Johnston's primary practice is Permanente Medical Group Inc in Redwood City, California. Dmand AI also links Hilary Johnston to 1 group practice or clinic and 1 medical group.
What is Hilary D. Johnston's office phone number?
The practice phone on file for Hilary Johnston is (650) 299-2000.
What is Hilary D. Johnston's medical license number?
Hilary Johnston holds California license 53387.
What medical group is Hilary D. Johnston part of?
Hilary Johnston is linked to The Permanente Medical Group, Inc. Dmand AI links Hilary Johnston to 1 more medical group.
Does Hilary D. Johnston accept Medicare?
Yes. CMS lists Hilary Johnston as accepting Medicare assignment.
What drugs does Hilary D. Johnston prescribe most?
In 2024 Medicare Part D data, Hilary Johnston's most prescribed drugs by claims were Mupirocin, Betamethasone Diprop Augmented and Clobetasol Propionate.
How long has Hilary D. Johnston been practicing?
Hilary Johnston graduated from medical school in 2016, 10 years ago.
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