Int Ophthalmol Clin
BiopsyConjunctivaCornea
Dr. Jonathan I. Diamant, MD
NPI1649358474PAC ID1658566096
- Medicare services, 2024
- 22
- Medicare patients, 2024
- 21
- Part D claims, 2024
- 2,397
- Publications
- 3
- Hospital affiliations
- 2
- Practice address
- 975 Sereno Dr, Vallejo, CA 94589
- Practice phone
- Call (707) 651-1000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Diamant'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. Jonathan I. Diamant is an ophthalmologist in Vallejo, California
Dr. Diamant practices at Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente.
Dr. Diamant's NPI, 1649358474, was assigned on November 1, 2006. Dr. Diamant graduated from Vagelos College of Physicians and Surgeons in 1993. Dr. Diamant holds California license G83886.
NPI and contact details
- NPI
- 1649358474NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1658566096
- NPI enumeration date
- November 1, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (707) 651-1000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jonathan I. Diamant practices at Vallejo Medical Center in Vallejo, California
Dr. Diamant's primary practice is Vallejo Medical Center, at 975 Sereno Dr, Vallejo, CA 94589 in Solano County. The practice phone is (707) 651-1000.
- Vallejo Medical Center975 Sereno Dr, Vallejo, CA 94589 · Solano CountyPhone(707) 651-1000
Source: Dmand AI Affiliation Data
Dr. Jonathan I. Diamant is affiliated with 4 sites of care and 1 medical group
Dr. Diamant's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. Dr. Diamant is also affiliated with Vacaville Medical Center. The medical group on file is The Permanente Medical Group, Inc. Dmand AI also links Dr. Diamant to 1 more home health agency and 1 hospice, each named with a free account.
Vacaville Medical CenterThe Permanente Medical Group, Inc.1 home health agencyName with a free account1 hospiceName with a free account
See all 5 affiliations for Dr. DiamantSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jonathan I. Diamant's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Diamant practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Vallejo Medical Center | Available with a free account |
| +3 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jonathan I. Diamant is one of 2,621 ophthalmologists in California
Ophthalmology is Dr. Diamant's primary specialty in the NPI Registry, under taxonomy code 207W00000X. Dr. Diamant is board certified in ophthalmology by the American Board of Ophthalmology. Dmand AI has Dr. Diamant's licenses on file in 2 states: California and Nevada.
Specialties and state licenses
- Ophthalmology, CaliforniaPrimary
- Nevada license
Clinical focus
Dmand AI lists cataract, cataract surgery with lens implant, eyelid inflammation, glaucoma surgery, hereditary corneal conditions and inflammation of iris among the conditions Dr. Diamant treats.
Ophthalmologists near Dr. Diamant
Counts of ophthalmologists with a Dmand AI profile, by place and practice. Each opens the list.
2,621ophthalmologists in California29ophthalmologists in Vallejo23ophthalmologists at Vallejo Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Jonathan I. Diamant billed Medicare for 22 services in 2024
CMS data shows 22 Medicare services from Dr. Diamant across 1 procedure code in 2024, all of them office visits, for 21 Medicare patients. Medicare paid $1,306 for them. Every service was in an office.
Medicare services, 202422
Medicare patients21
Paid by Medicare$1,306
Procedure codes1
Dr. Diamant's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 212024: 225%
Dr. Diamant compared with the California median for ophthalmologists, 2024
- Dr. Diamant
- California median
- Medicare services
- 22vs 1,07998% below
- Medicare patients
- 21vs 42195% below
- Part D claims
- 2,291vs 6183.7 times
Medians across 2,568 ophthalmologists in California with Dmand AI profiles that report each measure.
Dr. Diamant'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. Diamant and other ophthalmologists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Jonathan I. Diamant treated 21 Medicare patients in 2024, average age 67
CMS counts 21 Medicare patients who saw Dr. Diamant in 2024. 57% of them have high blood pressure. Their average risk score is 0.70, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Diamant's median patient age at 60, with 64% women.
Medicare patients, 202421
Average age67
Average risk score0.70
Chronic conditions among Dr. Diamant's Medicare patients, 2024
- High blood pressure57%
Share of Medicare patients with each condition. A patient can have several.
Dr. Diamant's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women64%
- Men35%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jonathan I. Diamant wrote 2,397 Medicare Part D claims in 2024
In 2024, Dr. Diamant wrote 2,397 Medicare Part D claims for 522 patients. 68% of them were for generic drugs. CMS names the drug for 2,291 of them, across 27 drugs with 11 or more claims each, at $166,909 in total drug cost. In 2023, CMS named 2,162 claims across 26 drugs.
Part D claims, 20242,397
Drugs named by CMS27
Total drug cost$166,909
Part D patients522
Dr. Diamant's Part D claims by kind of drug, 2024
- Generic1,634 claims68%
- Brand-name and other763 claims32%
Dr. Diamant'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. Diamant's Part D claims, 2024
- Opioids1%20 of 2,397 claims
- Antibiotics2%40 of 2,397 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: 2,1622024: 2,2916%
Drugs named by CMS: 27 in 2024, 26 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
How Dr. Jonathan I. Diamant takes part in Medicare
Dr. Diamant accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Cataract surgery: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Jonathan I. Diamant has 3 publications on record
Dmand AI links 3 papers to Dr. Diamant. The most frequent topics are Conjunctiva. Dr. Diamant's most frequent co-authors are Richard L. Abbott, MD, Robin Benis, MD and Thomas M. Lietman, MD.
Papers3
Topics Dr. Diamant writes about most
- Conjunctiva
Dr. Diamant's most frequent co-authors
Recent publications by Dr. Diamant
Ophthalmic Epidemiol
Chlamydia trachomatisConjunctivaDNA, Bacterial
Administration, TopicalAntihypertensive AgentsBrimonidine Tartrate
See who Dr. Diamant researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Diamant works with, so you can find a warm path to the right ophthalmologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Jonathan I. Diamant received $941 in industry payments from 2016 to 2025
CMS Open Payments shows 10 general payments to Dr. Diamant from 6 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 100% of the total. Alcon Laboratories Inc paid the most, $254.
General payments to Dr. Diamant by program year, 2016 to 2025
Companies that paid Dr. Diamant the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Jonathan I. Diamant has 2 awards and honors on record
Dmand AI lists 2 awards for Dr. Diamant, most recently CMS Stage 1 2012 in 2011.
Awards and honors for Dr. Diamant
- 2011
- CMS Stage 1 2012
- Undated
- AAO Fellow
Source: Dmand AI Professional Profile Data
Dr. Jonathan I. Diamant graduated from Vagelos College of Physicians and Surgeons
Dr. Diamant graduated from Vagelos College of Physicians and Surgeons in 1993. Dr. Diamant is a member of AAO.
- Medical school
- Board certified in ophthalmology
Source: Dmand AI Professional Profile Data
Dr. Jonathan I. Diamant accepts plans from 2 insurance carriers
Dr. Diamant 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. Diamant accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Jonathan I. Diamant'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)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| 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. Jonathan I. Diamant
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. Jonathan I. Diamant's NPI number?
Dr. Jonathan I. Diamant's NPI number is 1649358474. It was assigned on November 1, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan I. Diamant?
Dr. Jonathan I. Diamant is an ophthalmologist in Vallejo, California. The primary specialty in the NPI Registry is Ophthalmology Physician (taxonomy code 207W00000X).
Where does Dr. Jonathan I. Diamant practice?
Dr. Diamant practices at 975 Sereno Dr, Vallejo, CA 94589. Dr. Diamant's primary practice is Vallejo Medical Center in Vallejo, California, part of Kaiser Permanente. Dmand AI also links Dr. Diamant to 1 home health agency and 1 hospice.
What is Dr. Jonathan I. Diamant's office phone number?
The practice phone on file for Dr. Diamant is (707) 651-1000.
What is Dr. Jonathan I. Diamant's medical license number?
Dr. Diamant holds California license G83886, one of the licenses on file in 2 states.
Which states has Dr. Jonathan I. Diamant been licensed in?
Dmand AI has state licenses on file for Dr. Diamant in California (1997 to 2027) and Nevada (2000 to 2001).
Which hospitals is Dr. Jonathan I. Diamant affiliated with?
Dr. Diamant practices at Vallejo Medical Center in Vallejo, California. Dr. Diamant is also affiliated with Vacaville Medical Center.
What medical group is Dr. Jonathan I. Diamant part of?
Dr. Diamant is linked to The Permanente Medical Group, Inc.
Does Dr. Jonathan I. Diamant accept Medicare?
Yes. CMS data shows Dr. Diamant billed Medicare for 22 services in 2024, and Dr. Diamant accepts Medicare assignment.
How many Medicare patients does Dr. Jonathan I. Diamant see?
CMS counts 21 Medicare patients who saw Dr. Diamant in 2024, with an average age of 67.
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Is Dr. Jonathan I. Diamant board certified?
Yes. Dr. Diamant is board certified in ophthalmology by the American Board of Ophthalmology.
What services does Dr. Jonathan I. Diamant bill to Medicare?
In 2024, Dr. Diamant's most billed Medicare services were office visit, established patient (99213).
Where did Dr. Jonathan I. Diamant go to medical school?
Dr. Diamant graduated from Vagelos College of Physicians and Surgeons in 1993.
What drugs does Dr. Jonathan I. Diamant prescribe most?
In 2024 Medicare Part D data, Dr. Diamant's most prescribed drugs by claims were Prednisolone Acetate, Latanoprost and Dorzolamide-Timolol.
Has Dr. Jonathan I. Diamant received payments from drug or device companies?
CMS Open Payments shows $941 in general payments to Dr. Diamant from 6 companies from 2016 to 2025. The largest total came from Alcon Laboratories Inc.
How long has Dr. Jonathan I. Diamant been practicing?
Dr. Diamant graduated from medical school in 1993, 33 years ago.
Does Dr. Jonathan I. Diamant do research?
Dmand AI links 3 publications to Dr. Diamant.
Who does Dr. Jonathan I. Diamant publish with?
Dr. Diamant's most frequent co-authors are Richard L. Abbott, MD (1 shared paper), Robin Benis, MD (1 shared paper) and Thomas M. Lietman, MD (1 shared paper).
What insurance does Dr. Jonathan I. Diamant accept?
Dr. Diamant 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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