Dr. Donald N N. Forthal, MD
- Medicare services, 2024
- 135
- Medicare patients, 2024
- 99
- Part D claims, 2024
- 333
- Publications
- 72
- Clinical trials
- 1
- 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
Find Dr. Forthal'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. Donald N N. Forthal is an infectious disease specialist in Orange, California
Dr. Forthal practices at UCI Health - Orange in Orange, California, part of UC Irvine.
Dr. Forthal's NPI, 1215017363, was assigned on October 16, 2006. Dr. Forthal graduated from UC Irvine School of Medicine in 1979. Dr. Forthal holds California license 000000G44065.
- NPI
- 1215017363NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2567546401
- 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
- Male
- Estimated age
- 73
- Medical school graduation
- 1979
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Donald N N. Forthal practices at UCI Health - Orange in Orange, California
Dr. Forthal'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. Donald N N. Forthal is affiliated with 2 sites of care and 1 medical group
Dr. Forthal'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. Forthal 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. Donald N N. Forthal's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Forthal 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. Donald N N. Forthal is one of 1,054 infectious disease specialists in California
Infectious disease is Dr. Forthal's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Forthal is board certified in pediatrics by the American Board of Pediatrics. Dmand AI has Dr. Forthal's licenses on file in 2 states: California and Georgia.
Specialties and state licenses
- Infectious disease, CaliforniaPrimary
- Georgia license
Clinical focus
Dmand AI lists acute skin infection, hiv/aids, joint or bone infection and yeast infection among the conditions Dr. Forthal treats.
Infectious disease specialists near Dr. Forthal
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. Donald N N. Forthal billed Medicare for 135 services in 2024
CMS data shows 135 Medicare services from Dr. Forthal across 6 procedure codes in 2024, for 99 Medicare patients. Medicare paid $10,042 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Forthal's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 542024: 115113%
- Other services
- 2023: 02024: 20
Dr. Forthal compared with the California median for infectious disease specialists, 2024
- Dr. Forthal
- California median
- Medicare services
- 135vs 42969% below
- Medicare patients
- 99vs 18045% below
- Part D claims
- 236vs 11998% above
Medians across 930 infectious disease specialists in California with Dmand AI profiles that report each measure.
Dr. Forthal'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. Forthal 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. Donald N N. Forthal treated 99 Medicare patients in 2024, average age 71
CMS counts 99 Medicare patients who saw Dr. Forthal in 2024. The largest group is 65 to 74, with 47 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 56% are also on Medicaid. Their average risk score is 3.63, 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. Forthal's median patient age at 58, with 45% women.
Dr. Forthal's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Forthal's Medicare patients by sex, 2024
- Women3838%
- Men6162%
Chronic conditions among Dr. Forthal's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes60%
- Arthritis56%
- Ischemic heart disease51%
- Chronic kidney disease49%
- Mood disorders37%
- Anxiety36%
Share of Medicare patients with each condition. A patient can have several.
Dr. Forthal's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women45%
- Men53%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Donald N N. Forthal wrote 333 Medicare Part D claims in 2024
In 2024, Dr. Forthal wrote 333 Medicare Part D claims for 38 patients. 34% of them were for generic drugs. CMS names the drug for 236 of them, across 12 drugs with 11 or more claims each, at $722,586 in total drug cost. In 2023, CMS named 296 claims across 17 drugs.
Dr. Forthal's Part D claims by kind of drug, 2024
- Generic114 claims34%
- Brand-name219 claims66%
Dr. Forthal'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. Forthal's Part D claims, 2024
- Opioids4%13 of 333 claims
- Antibiotics8%25 of 333 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: 2962024: 23620%
Drugs named by CMS: 12 in 2024, 17 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. Donald N N. Forthal 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. Forthal for performance year 2024, reported through an alternative payment model (APM). Dr. Forthal accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Forthal as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Dr. Forthal'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.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Donald N N. Forthal has 72 publications on record
Dmand AI links 72 papers to Dr. Forthal, published from 2005 to 2024. 2015 was the busiest year, with 5. The most frequent topics are HIV-1, HIV Antibodies and Macaca mulatta. Dr. Forthal has published most often in J Virol. Dr. Forthal's most frequent co-authors are Luis M De La Maza, MD, Richard H. Haubrich, MD and Kamyar Zadeh Kalantar-Zadeh, MD.
Dr. Forthal's papers by year, 2014 to 2024
Topics Dr. Forthal writes about most
- HIV-1
- HIV Antibodies
- Macaca mulatta
- HIV Infections
- Antibodies, Viral
- Simian Immunodeficiency Virus
- Simian Acquired Immunodeficiency Syndrome
- Antibody-Dependent Cell Cytotoxicity
Dr. Forthal's most frequent co-authors
- Luis M De La Maza, MD2 shared papers
- Richard H. Haubrich, MD2 shared papers
- Kamyar Zadeh Kalantar-Zadeh, MD2 shared papers
Recent publications by Dr. Forthal
See who Dr. Forthal researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Forthal 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. Donald N N. Forthal has worked on 1 clinical trial
Dmand AI links Dr. Forthal to 1 clinical trial. Conditions studied include COVID-19 and Pneumonia, Viral. Open Payments lists research payments to Dr. Forthal that name 1 trial.
Conditions in Dr. Forthal's trials
- COVID-19
- Pneumonia, Viral
Investigators on the most trials with Dr. Forthal
- Hessam Aazami, MD1 shared trial
- Jalal M. Abbas, MD1 shared trial
- Luis Kurosh Abrishamian-Garcia, MD1 shared trial
Recent clinical trials with Dr. Forthal
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Donald N N. Forthal received $43 in industry payments from 2018 to 2023
CMS Open Payments shows 2 general payments to Dr. Forthal from 2 drug and device companies from 2018 to 2023. Food and beverage make up the largest share, 100% of the total. ViiV Healthcare Company paid the most, $31. It also lists 1 research payment totaling $504 in 2020, naming 1 clinical trial.
General payments to Dr. Forthal by program year, 2018 to 2023
Companies that paid Dr. Forthal the most, 2018 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Donald N N. Forthal graduated from UC Irvine School of Medicine
Dr. Forthal graduated from UC Irvine School of Medicine in 1979.
- Medical school
- Board certified in pediatrics
Source: Dmand AI Professional Profile Data
Dr. Donald N N. Forthal accepts plans from 13 insurance carriers
Dr. Forthal is in network with 13 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- Elevance
- United Healthcare
- Blue Cross Blue Shield of Michigan
- HCSC
- Blue Cross Blue Shield of Massachusetts
- Regence Health Plans
- Alliant Health Plans
- +5 more carriersWith a free account
Plan types Dr. Forthal accepts, by number of carriers
- PPO9
- Medicare7
- HMO6
- EPO4
- POS3
Source: Dmand AI Insurance Network Data
Sources for Dr. Donald N N. Forthal'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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| Industry payments | Open Payments (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. Donald N N. Forthal
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. Donald N N. Forthal's NPI number?
Dr. Donald N N. Forthal's NPI number is 1215017363. It was assigned on October 16, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Donald N N. Forthal?
Dr. Donald N N. Forthal 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. Donald N N. Forthal practice?
Dr. Forthal practices at 101 City Drive South, Orange, CA 92868. Dr. Forthal's primary practice is UCI Health - Orange in Orange, California, part of UC Irvine. Dmand AI also links Dr. Forthal to 1 group practice or clinic.
What is Dr. Donald N N. Forthal's office phone number?
The practice phone on file for Dr. Forthal is (714) 456-7890.
What is Dr. Donald N N. Forthal's medical license number?
Dr. Forthal holds California license 000000G44065, one of the licenses on file in 2 states.
Which states has Dr. Donald N N. Forthal been licensed in?
Dmand AI has state licenses on file for Dr. Forthal in California (1981 to 2026) and Georgia (1985 to 1989).
Which hospitals is Dr. Donald N N. Forthal affiliated with?
Dr. Forthal practices at UCI Health - Orange in Orange, California.
What medical group is Dr. Donald N N. Forthal part of?
Dr. Forthal is linked to UCI Health Physicians.
Does Dr. Donald N N. Forthal accept Medicare?
Yes. CMS data shows Dr. Forthal billed Medicare for 135 services in 2024, and Dr. Forthal accepts Medicare assignment.
Does Dr. Donald N N. Forthal offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Forthal as offering telehealth services.
Show 11 more questionsShow fewer questions
What is Dr. Donald N N. Forthal's MIPS score?
Dr. Forthal'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. Donald N N. Forthal see?
CMS counts 99 Medicare patients who saw Dr. Forthal in 2024, with an average age of 71.
Is Dr. Donald N N. Forthal board certified?
Yes. Dr. Forthal is board certified in pediatrics by the American Board of Pediatrics.
What services does Dr. Donald N N. Forthal bill to Medicare?
In 2024, Dr. Forthal's most billed Medicare services were office visit, established patient (99214), hospital inpatient care (99222) and medicare service (G2211).
Where did Dr. Donald N N. Forthal go to medical school?
Dr. Forthal graduated from UC Irvine School of Medicine in 1979.
What drugs does Dr. Donald N N. Forthal prescribe most?
In 2024 Medicare Part D data, Dr. Forthal's most prescribed drugs by claims were Biktarvy, Descovy and Juluca.
Has Dr. Donald N N. Forthal received payments from drug or device companies?
CMS Open Payments shows $43 in general payments to Dr. Forthal from 2 companies from 2018 to 2023. The largest total came from ViiV Healthcare Company.
How long has Dr. Donald N N. Forthal been practicing?
Dr. Forthal graduated from medical school in 1979, 47 years ago.
Does Dr. Donald N N. Forthal do research?
Dmand AI links 72 publications to Dr. Forthal, published from 2005 to 2024. Dr. Forthal has worked on 1 clinical trial.
Who does Dr. Donald N N. Forthal publish with?
Dr. Forthal's most frequent co-authors are Luis M De La Maza, MD (2 shared papers), Richard H. Haubrich, MD (2 shared papers) and Kamyar Zadeh Kalantar-Zadeh, MD (2 shared papers).
What insurance does Dr. Donald N N. Forthal accept?
Dr. Forthal is in network with 13 carriers, including Aetna, Elevance and United Healthcare. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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