Dr. Jay A. Greenstein, MD
- Part D claims, 2026
- 50
- Affiliated sites
- 1
- Medical groups
- 6
- Insurance carriers
- 1
- State licenses
- 2
- Practice address
- 900 E Hamilton Ave, Campbell, CA 95008
- Practice phone
- Call (469) 466-7007
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Signify Health
Campbell, California
Find Dr. Greenstein'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. Greenstein is a general practice physician in Campbell, California
Dr. Greenstein practices at Signify Health in Campbell, California.
Dr. Greenstein's NPI, 1982615696, was assigned on August 10, 2006. Dr. Greenstein graduated from The Johns Hopkins University School of Medicine in 1973. Dr. Greenstein holds California license A25998.
- NPI
- 1982615696NPI Registry (opens in a new tab)
- NPI enumeration date
- August 10, 2006
- NPI status
- Active
- Practice phone
- (469) 466-7007
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Medical school graduation
- 1973
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Jay A. Greenstein practices at Signify Health in Campbell, California
Dr. Greenstein's primary practice is Signify Health, at 900 E Hamilton Ave, Campbell, CA 95008 in Santa Clara County. The practice phone is (469) 466-7007.
- Signify Health900 E Hamilton Ave, Campbell, CA 95008 · Santa Clara CountyPhone(469) 466-7007
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Jay A. Greenstein is affiliated with 2 sites of care and 6 medical groups
Dr. Greenstein's primary practice is Signify Health in Campbell, California. The medical group on file is Signify Health. Dmand AI also links Dr. Greenstein to 5 more medical groups and 1 group practice or clinic, 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. Greenstein's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Greenstein practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Signify Health | Available with a free account |
| +1 more site and 5 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across each health system and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Jay A. Greenstein is one of 1,526 general practice physicians in California
General practice is Dr. Greenstein's primary specialty in the NPI Registry, under taxonomy code 208D00000X. Dmand AI has Dr. Greenstein's licenses on file in 2 states: California and South Carolina.
Specialties and state licenses
- General practice, CaliforniaPrimary
- South Carolina license
General practice physicians near Dr. Greenstein
Counts of general practice 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. Greenstein's patients have a median age of 73
Across all payers, Dmand AI patient panel data puts Dr. Greenstein's median patient age at 73, with 55% women.
Dr. Greenstein's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 73
Patient panel by sex, all payers
- Women55%
- Men44%
Source: Dmand AI Patient Panel Data
Dr. Jay A. Greenstein wrote 50 Medicare Part D claims in 2026
In 2026, Dr. Greenstein wrote 50 Medicare Part D claims. 78% of them were for generic drugs.
Dr. Greenstein's Part D claims by kind of drug, 2026
- Generic39 claims78%
- Brand-name11 claims22%
Source: Medicare Part D Prescribers - by Provider (CMS), 2026 data
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Dr. Jay A. Greenstein graduated from The Johns Hopkins University School of Medicine
Dr. Greenstein graduated from The Johns Hopkins University School of Medicine in 1973. Dr. Greenstein is a member of AAEM.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Jay A. Greenstein accepts plans from 1 insurance carrier
Dr. Greenstein is in network with 1 carrier, including GA State Medicaid. Medicaid plans come from the most carriers, 1. Check the plan with the practice before a visit.
- GA State Medicaid
Source: Dmand AI Insurance Network Data
Sources for Dr. Jay A. Greenstein'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 (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. Greenstein
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. Greenstein's NPI number?
Dr. Jay A. Greenstein's NPI number is 1982615696. It was assigned on August 10, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jay A. Greenstein?
Dr. Jay A. Greenstein is a general practice physician in Campbell, California. The primary specialty in the NPI Registry is General Practice Physician (taxonomy code 208D00000X).
Where does Dr. Jay A. Greenstein practice?
Dr. Greenstein practices at 900 E Hamilton Ave, Campbell, CA 95008. Dr. Greenstein's primary practice is Signify Health in Campbell, California. Dmand AI also links Dr. Greenstein to 5 medical groups and 1 group practice or clinic, and a free account names each one.
What is Dr. Jay A. Greenstein's office phone number?
The practice phone on file for Dr. Greenstein is (469) 466-7007. Dmand AI also checks direct phone and mobile numbers, available with a free account.
What is Dr. Jay A. Greenstein's email address?
Dmand AI checks professional and personal email addresses for Dr. Greenstein through healthcare-specific waterfall enrichment. They are available with a free Dmand AI account.
What is Dr. Jay A. Greenstein's medical license number?
Dr. Greenstein holds California license A25998, one of the licenses on file in 2 states.
Which states has Dr. Jay A. Greenstein been licensed in?
Dmand AI has state licenses on file for Dr. Greenstein in California (1974 to 2027) and South Carolina (1986 to 1987).
What medical group is Dr. Jay A. Greenstein part of?
Dr. Greenstein is linked to Signify Health. Dmand AI links Dr. Greenstein to 5 more medical groups, named with a free account.
Who does Dr. Jay A. Greenstein practice with?
Dmand AI links 99 HCPs to Dr. Greenstein's primary medical group, 14 of them general practice physicians. A free account lists them, with verified contacts.
Where did Dr. Jay A. Greenstein go to medical school?
Dr. Greenstein graduated from The Johns Hopkins University School of Medicine in 1973.
Show 3 more questionsShow fewer questions
How long has Dr. Jay A. Greenstein been practicing?
Dr. Greenstein graduated from medical school in 1973, 53 years ago.
What EHR does Dr. Jay A. Greenstein's practice use?
Dmand AI tracks the EHR system at Signify Health and at 1 more site and 5 medical groups. The vendor and product are available with a free Dmand AI account.
What insurance does Dr. Jay A. Greenstein accept?
Dr. Greenstein is in network with 1 carrier, including GA State Medicaid. Medicaid plans come from the most carriers, 1. Check the plan with the practice before a visit.
Selling to general practice practices?
See general practice physicians in California by site of care and group
Find the practices, groups and hospitals they work with, and the right people to contact at each.
- 30 days free
- Self-serve
- No credit card