Dr. Jay A. Keystone, MD
- Part D claims, 2024
- 138
- Affiliated sites
- 1
- Medical group
- 1
- Insurance carriers
- 5
- State licenses
- 7
- Practice address
- 650 5th St, San Francisco, CA 94107
- Practice phone
- Call (415) 231-5333
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Plushcare of California Inc a Professional Corporation
San Francisco, California
Find Dr. Keystone'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. Jay A. Keystone is an allergy and immunology (internal medicine) physician in San Francisco, California
Dr. Keystone practices at Plushcare of California Inc a Professional Corporation in San Francisco, California.
Dr. Keystone's NPI, 1306115001, was assigned on December 26, 2011. Dr. Keystone graduated from University Of Michigan Medical School in 1962. Dr. Keystone's California license number on file is C29865.
- NPI
- 1306115001NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8325383250
- NPI enumeration date
- December 26, 2011
- NPI status
- Active
- Practice phone
- (415) 231-5333
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 82
- Medical school graduation
- 1962
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Jay A. Keystone practices at Plushcare of California Inc a Professional Corporation in San Francisco, California
Dr. Keystone's primary practice is Plushcare of California Inc a Professional Corporation, at 650 5th St, San Francisco, CA 94107 in San Francisco County. The practice phone is (415) 231-5333.
- Plushcare of California Inc a Professional Corporation650 5th St, San Francisco, CA 94107 · San Francisco CountyPhone(415) 231-5333
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Jay A. Keystone is affiliated with 2 sites of care and 1 medical group
Dr. Keystone's primary practice is Plushcare of California Inc a Professional Corporation in San Francisco, California. Dmand AI also links Dr. Keystone to 1 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 Dr. Jay A. Keystone's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Keystone practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Plushcare of California Inc a Professional Corporation | 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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Dr. Jay A. Keystone is one of 70 allergys and immunology (internal medicine) physicians in California
Allergy and immunology is Dr. Keystone's primary specialty in the NPI Registry, under taxonomy code 207RA0201X. Dr. Keystone is board certified in allergy & immunology by the American Board of Allergy and Immunology. Dmand AI has Dr. Keystone's licenses on file in 7 states: California, Florida, Ohio, Michigan, Virginia, Vermont and Nevada.
Specialties and state licenses
- Allergy and immunology (internal medicine), CaliforniaPrimary
- Florida license
- Ohio license
- Michigan license
- Virginia license
- Vermont license
- Nevada license
Allergys and immunology (internal medicine) physicians near Dr. Keystone
Counts of allergys and immunology (internal medicine) physicians 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. Jay A. Keystone's patients have a median age of 50
Across all payers, Dmand AI patient panel data puts Dr. Keystone's median patient age at 50, with 25% women.
Dr. Keystone's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 50
Patient panel by sex, all payers
- Women25%
- Men75%
Source: Dmand AI Patient Panel Data
Dr. Jay A. Keystone wrote 138 Medicare Part D claims in 2024
In 2024, Dr. Keystone wrote 138 Medicare Part D claims for 30 patients. 80% of them were for generic drugs. CMS names the drug for 24 of them, across 2 drugs with 11 or more claims each, at $720 in total drug cost. In 2023, CMS named 23 claims across 2 drugs.
Dr. Keystone's Part D claims by kind of drug, 2024
- Generic111 claims80%
- Brand-name and other27 claims20%
Dr. Keystone'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. Keystone's Part D claims, 2024
- Antibiotics12%16 of 138 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: 232024: 244%
Drugs named by CMS: 2 in 2024, 2 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
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Dr. Jay A. Keystone graduated from University Of Michigan Medical School
Dr. Keystone graduated from University Of Michigan Medical School in 1962.
- Medical school
- Board certified in allergy & immunology
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Jay A. Keystone accepts plans from 5 insurance carriers
Dr. Keystone is in network with 5 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and Elevance. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- Elevance
- HCSC
- CMS Medicare
Plan types Dr. Keystone accepts, by number of carriers
- Medicare3
- PPO3
- HMO2
- Medicaid1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Jay A. Keystone'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) |
| 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. Jay A. Keystone
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. Jay A. Keystone's NPI number?
Dr. Jay A. Keystone's NPI number is 1306115001. It was assigned on December 26, 2011, and it is active in the NPI Registry.
What kind of doctor is Dr. Jay A. Keystone?
Dr. Jay A. Keystone is an allergy and immunology (internal medicine) physician in San Francisco, California. The primary specialty in the NPI Registry is Allergy & Immunology (Internal Medicine) Physician (taxonomy code 207RA0201X).
Where does Dr. Jay A. Keystone practice?
Dr. Keystone practices at 650 5th St, San Francisco, CA 94107. Dr. Keystone's primary practice is Plushcare of California Inc a Professional Corporation in San Francisco, California. Dmand AI also links Dr. Keystone to 1 group practice or clinic and 1 medical group.
What is Dr. Jay A. Keystone's office phone number?
The practice phone on file for Dr. Keystone is (415) 231-5333.
What is Dr. Jay A. Keystone's medical license number?
Dr. Keystone's California license number on file is C29865, one of the licenses on file in 7 states.
Which states has Dr. Jay A. Keystone been licensed in?
Dmand AI has state licenses on file for Dr. Keystone in California (1968 to 2025), Florida (since 2022), Ohio, Michigan (2021 to 2027), Virginia (2023 to 2026), Vermont (2022 to 2024) and Nevada (2001 to 2017).
Is Dr. Jay A. Keystone board certified?
Yes. Dr. Keystone is board certified in allergy & immunology by the American Board of Allergy and Immunology.
Where did Dr. Jay A. Keystone go to medical school?
Dr. Keystone graduated from University Of Michigan Medical School in 1962.
What drugs does Dr. Jay A. Keystone prescribe most?
In 2024 Medicare Part D data, Dr. Keystone's most prescribed drugs by claims were Fluticasone-Salmeterol and Lisinopril.
How long has Dr. Jay A. Keystone been practicing?
Dr. Keystone graduated from medical school in 1962, 64 years ago.
What insurance does Dr. Jay A. Keystone accept?
Dr. Keystone is in network with 5 carriers, including Blue Cross Blue Shield of Michigan, Blue Cross Blue Shield of Massachusetts and Elevance. Medicare plans come from the most carriers, 3. Check the plan with the practice before a visit.
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