Dr. Catherine Diamond, MD
- Medicare services, 2024
- 442
- Medicare patients, 2024
- 189
- Part D claims, 2024
- 5,190
- Publications
- 17
- MIPS score, 2024
- 100
- Practice address
- 101 City Drive South, Orange, CA 92868
- Practice phone
- Call (714) 456-7890
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Catherine Diamond is an infectious disease specialist in Orange, California
Dr. Diamond practices at UCI Health - Orange in Orange, California, part of UC Irvine.
Dr. Diamond's NPI, 1649350786, was assigned on October 16, 2006. Dr. Diamond graduated from Albany Medical College in 1991. Dr. Diamond holds California license 000000G84863.
- NPI
- 1649350786NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9234210824
- NPI enumeration date
- October 16, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (714) 456-7890
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Catherine Diamond practices at UCI Health - Orange in Orange, California
Dr. Diamond's primary practice is UCI Health - Orange, at 101 City Drive South, Orange, CA 92868 in Orange County. The practice phone is (714) 456-7890.
- UCI Health - Orange101 City Drive South, Orange, CA 92868 · Orange CountyPhone(714) 456-7890
Source: Dmand AI Affiliation Data
Dr. Catherine Diamond is affiliated with 2 sites of care and 1 medical group
Dr. Diamond's primary practice is UCI Health - Orange in Orange, California, part of UC Irvine. The medical group on file is UCI Health Physicians. Dmand AI also links Dr. Diamond to 1 more group practice or clinic, named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Catherine Diamond's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Diamond practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| UCI Health - Orange | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Catherine Diamond is one of 1,054 infectious disease specialists in California
Infectious disease is Dr. Diamond's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Diamond is board certified in infectious disease by the American Board of Internal Medicine. Dmand AI has Dr. Diamond's licenses on file in 2 states: California and Washington.
Specialties and state licenses
- Infectious disease, CaliforniaPrimary
- Washington license
Clinical focus
Dmand AI lists acute kidney failure, chronic diabetes, diabetic emergency, fatty liver, fibromyalgia and chronic pain, fluid and electrolyte imbalances, high cholesterol and hiv/aids among the conditions Dr. Diamond treats.
Infectious disease specialists near Dr. Diamond
Counts of infectious disease specialists 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. Catherine Diamond billed Medicare for 442 services in 2024
CMS data shows 442 Medicare services from Dr. Diamond across 6 procedure codes in 2024, for 189 Medicare patients. Medicare paid $33,316 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Diamond's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3082024: 39428%
- Other services
- 2023: 02024: 48
Dr. Diamond compared with the California median for infectious disease specialists, 2024
- Dr. Diamond
- California median
- Medicare services
- 442vs 429Close to median
- Medicare patients
- 189vs 1805% above
- Part D claims
- 4,769vs 11940.1 times
Medians across 930 infectious disease specialists in California with Dmand AI profiles that report each measure.
Dr. Diamond'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. Diamond and other infectious disease specialists in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Catherine Diamond treated 189 Medicare patients in 2024, average age 66
CMS counts 189 Medicare patients who saw Dr. Diamond in 2024. The largest group is under 65, with 76 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 80% are also on Medicaid. Their average risk score is 3.20, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Diamond's median patient age at 57, with 26% women.
Dr. Diamond's Medicare patients by age, 2024
Dr. Diamond's Medicare patients by sex, 2024
- Women4926%
- Men14074%
Chronic conditions among Dr. Diamond's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes54%
- Chronic kidney disease47%
- Arthritis42%
- Mood disorders37%
- Depression34%
- Ischemic heart disease34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Diamond's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 57
Patient panel by sex, all payers
- Women26%
- Men74%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Catherine Diamond wrote 5,190 Medicare Part D claims in 2024
In 2024, Dr. Diamond wrote 5,190 Medicare Part D claims for 129 patients. 66% of them were for generic drugs. CMS names the drug for 4,769 of them, across 117 drugs with 11 or more claims each, at $5,333,313 in total drug cost. In 2023, CMS named 4,402 claims across 110 drugs.
Dr. Diamond's Part D claims by kind of drug, 2024
- Generic3,407 claims66%
- Brand-name1,763 claims34%
- Other20 claims0%
Dr. Diamond'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. Diamond's Part D claims, 2024
- Opioids3%165 of 5,190 claims
- Antibiotics2%129 of 5,190 claims
- Antipsychotics, patients 65 and over1%46 of 5,190 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: 4,4022024: 4,7698%
Drugs named by CMS: 117 in 2024, 110 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
Dr. Catherine Diamond scored 100 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 100 out of 100 for Dr. Diamond for performance year 2024, reported through an alternative payment model (APM). Dr. Diamond accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Diamond as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Diamond's MIPS scores, performance year 2024
- 100of 100Final score
- 83.7of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026; and Doctors and Clinicians Utilization Data (CMS)
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Dr. Catherine Diamond has 17 publications on record
Dmand AI links 17 papers to Dr. Diamond, published from 2021 to 2024. The most frequent topics are HIV Infections, Antiretroviral Therapy, Highly Active and Acquired Immunodeficiency Syndrome. Dr. Diamond has published most often in Sex Transm Dis. Dr. Diamond's most frequent co-authors are Miguel A. Goicoechea, MD, Robert Key Bolan, MD and Vi Quynh Bowman, MD.
Topics Dr. Diamond writes about most
- HIV Infections
- Antiretroviral Therapy, Highly Active
- Acquired Immunodeficiency Syndrome
- California
- Homosexuality, Male
- Anti-HIV Agents
- Lymphoma, AIDS-Related
- Lymphoma, Non-Hodgkin
Dr. Diamond's most frequent co-authors
- Miguel A. Goicoechea, MD2 shared papers
- Robert Key Bolan, MD1 shared paper
- Vi Quynh Bowman, MD1 shared paper
Recent publications by Dr. Diamond
J Virol Methods
J Acquir Immune Defic Syndr
See who Dr. Diamond researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Diamond works with, so you can find a warm path to the right infectious disease specialists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Catherine Diamond received $366 in industry payments from 2016 to 2020
CMS Open Payments shows 7 general payments to Dr. Diamond from 2 drug and device companies from 2016 to 2020. Food and beverage make up the largest share, 100% of the total. ViiV Healthcare Company paid the most, $270.
General payments to Dr. Diamond by program year, 2016 to 2020
Companies that paid Dr. Diamond the most, 2016 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Catherine Diamond has 1 award and honors on record
Dmand AI lists 1 award for Dr. Diamond, most recently ACP Fellow in 2002.
Awards and honors for Dr. Diamond
- 2002
- ACP Fellow
Source: Dmand AI Professional Profile Data
Dr. Catherine Diamond graduated from Albany Medical College
Dr. Diamond graduated from Albany Medical College in 1991. Dr. Diamond is a member of ACP.
- Medical school
- Board certified in infectious disease
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Catherine Diamond accepts plans from 13 insurance carriers
Dr. Diamond is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Blue Cross Blue Shield of Michigan
- United Healthcare
- Elevance
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +5 more carriersWith a free account
Plan types Dr. Diamond accepts, by number of carriers
- PPO9
- Medicare7
- HMO6
- EPO4
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Catherine Diamond'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)Clinician Public Reporting: Overall MIPS Performance (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. Catherine Diamond
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. Catherine Diamond's NPI number?
Dr. Catherine Diamond's NPI number is 1649350786. It was assigned on October 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Catherine Diamond?
Dr. Catherine Diamond is an infectious disease specialist in Orange, California. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. Catherine Diamond practice?
Dr. Diamond practices at 101 City Drive South, Orange, CA 92868. Dr. Diamond's primary practice is UCI Health - Orange in Orange, California, part of UC Irvine. Dmand AI also links Dr. Diamond to 1 group practice or clinic.
What is Dr. Catherine Diamond's office phone number?
The practice phone on file for Dr. Diamond is (714) 456-7890.
What is Dr. Catherine Diamond's medical license number?
Dr. Diamond holds California license 000000G84863, one of the licenses on file in 2 states.
Which states has Dr. Catherine Diamond been licensed in?
Dmand AI has state licenses on file for Dr. Diamond in California (1998 to 2026) and Washington (1994 to 1999).
Which hospitals is Dr. Catherine Diamond affiliated with?
Dr. Diamond practices at UCI Health - Orange in Orange, California.
What medical group is Dr. Catherine Diamond part of?
Dr. Diamond is linked to UCI Health Physicians.
Does Dr. Catherine Diamond accept Medicare?
Yes. CMS data shows Dr. Diamond billed Medicare for 442 services in 2024, and Dr. Diamond accepts Medicare assignment.
Does Dr. Catherine Diamond offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Diamond as offering telehealth services.
Show 11 more questionsShow fewer questions
What is Dr. Catherine Diamond's MIPS score?
Dr. Diamond's MIPS final score for performance year 2024 is 100 out of 100, reported through an alternative payment model (APM).
How many Medicare patients does Dr. Catherine Diamond see?
CMS counts 189 Medicare patients who saw Dr. Diamond in 2024, with an average age of 66.
Is Dr. Catherine Diamond board certified?
Yes. Dr. Diamond is board certified in infectious disease by the American Board of Internal Medicine.
What services does Dr. Catherine Diamond bill to Medicare?
In 2024, Dr. Diamond's most billed Medicare services were office visit, established patient (99214), hospital inpatient care (99222) and hospital inpatient care (99233).
Where did Dr. Catherine Diamond go to medical school?
Dr. Diamond graduated from Albany Medical College in 1991.
What drugs does Dr. Catherine Diamond prescribe most?
In 2024 Medicare Part D data, Dr. Diamond's most prescribed drugs by claims were Biktarvy, Atorvastatin Calcium and Gabapentin.
Has Dr. Catherine Diamond received payments from drug or device companies?
CMS Open Payments shows $366 in general payments to Dr. Diamond from 2 companies from 2016 to 2020. The largest total came from ViiV Healthcare Company.
How long has Dr. Catherine Diamond been practicing?
Dr. Diamond graduated from medical school in 1991, 35 years ago.
Does Dr. Catherine Diamond do research?
Dmand AI links 17 publications to Dr. Diamond, published from 2021 to 2024.
Who does Dr. Catherine Diamond publish with?
Dr. Diamond's most frequent co-authors are Miguel A. Goicoechea, MD (2 shared papers), Robert Key Bolan, MD (1 shared paper) and Vi Quynh Bowman, MD (1 shared paper).
What insurance does Dr. Catherine Diamond accept?
Dr. Diamond is in network with 13 carriers, including Aetna, Blue Cross Blue Shield of Michigan and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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