Graft RejectionImmunosuppressive AgentsKidney Transplantation
William Harmon
NPI1194883314
- Medicare services, 2024
- 630
- Medicare patients, 2024
- 36
- Part D claims, 2024
- 642
- Publications
- 11
- Industry payments
- $86
- Practice address
- 3120 Mission Dr, Santa Cruz, CA 95065-1824
- Practice phone
- Call (831) 462-0164
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
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William Harmon is an addiction psychiatry physician in Santa Cruz, California
William Harmon practices in Santa Cruz, California.
William Harmon's NPI, 1194883314, was assigned on December 4, 2006. William Harmon graduated from David Geffen School of Medicine at UCLA in 1968. William Harmon's California license number on file is A23325.
NPI and contact details
- NPI
- 1194883314NPI Registry (opens in a new tab)
- NPI enumeration date
- December 4, 2006
- NPI status
- Active
- Practice phone
- (831) 462-0164
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Medical school graduation
- 1968
Sources: NPPES NPI Registry (CMS); and Dmand AI Professional Profile Data
William Harmon's practice address is in Santa Cruz, California
William Harmon's practice address in the NPI Registry is 3120 Mission Dr, Santa Cruz, CA 95065-1824. The practice phone is (831) 462-0164.
- NPI Registry address3120 Mission Dr, Santa Cruz, CA 95065-1824Phone(831) 462-0164
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dmand AI tracks the EHR system at William Harmon's practice
Dmand AI tracks the electronic health record (EHR) system at each site where William Harmon practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| William Harmon's practice | Available with a free account |
Source: Dmand AI Technology Install Data
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William Harmon is one of 63 addiction psychiatry physicians in California
Addiction psychiatry is William Harmon's primary specialty in the NPI Registry, under taxonomy code 2084P0802X. William Harmon is board certified in psychiatry by the American Board of Psychiatry and Neurology. William Harmon has a license on file in California.
Specialties and state licenses
- Addiction psychiatry, CaliforniaPrimary
Clinical focus
Dmand AI lists anxiety, bipolar disorder and depression among the conditions William Harmon treats.
Addiction psychiatry physicians near William Harmon
Counts of addiction psychiatry physicians with a Dmand AI profile, by place and practice. Each opens the list.
63addiction psychiatry physicians in California
2addiction psychiatry physicians in Santa Cruz
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
William Harmon billed Medicare for 630 services in 2024
CMS data shows 630 Medicare services from William Harmon across 2 procedure codes in 2024, for 36 Medicare patients. Medicare paid $26,694 for them. Every service was in an office.
Medicare services, 2024630
Medicare patients36
Paid by Medicare$26,694
Procedure codes2
William Harmon's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 3852024: 31618%
- Tests and treatments
- 2023: 3812024: 31418%
William Harmon compared with the California median for addiction psychiatry physicians, 2024
- William Harmon
- California median
- Medicare services
- 630vs 1324.8 times
- Medicare patients
- 36vs 36Close to median
- Part D claims
- 563vs 1184.8 times
Medians across 60 addiction psychiatry physicians in California with Dmand AI profiles that report each measure.
William Harmon'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.
Need commercial claims for William Harmon?
Medicare shows one payer. Book a meeting to get commercial claims data for William Harmon and other addiction psychiatry physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
William Harmon treated 36 Medicare patients in 2024, average age 76
CMS counts 36 Medicare patients who saw William Harmon in 2024. The largest group is 75 to 84, with 22 patients. 75% of them have depression, and 75% have high cholesterol. Their average risk score is 1.18, where 1.00 is the Medicare average.
Medicare patients, 202436
Average age76
Average risk score1.18
William Harmon's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
William Harmon's Medicare patients by sex, 2024
- Women2261%
- Men1439%
Chronic conditions among William Harmon's Medicare patients, 2024
- Depression75%
- High cholesterol75%
- Mood disorders75%
- High blood pressure61%
- Arthritis44%
- Anxiety36%
- Bipolar disorder31%
Share of Medicare patients with each condition. A patient can have several.
Source: Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
William Harmon wrote 642 Medicare Part D claims in 2024
In 2024, William Harmon wrote 642 Medicare Part D claims for 56 patients. 98% of them were for generic drugs. CMS names the drug for 563 of them, across 26 drugs with 11 or more claims each, at $15,881 in total drug cost. In 2023, CMS named 507 claims across 23 drugs.
Part D claims, 2024642
Drugs named by CMS26
Total drug cost$15,881
Part D patients56
William Harmon's Part D claims by kind of drug, 2024
- Generic627 claims98%
- Brand-name15 claims2%
William Harmon'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 William Harmon's Part D claims, 2024
- Antipsychotics, patients 65 and over8%53 of 642 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: 5072024: 56311%
Drugs named by CMS: 26 in 2024, 23 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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William Harmon has 11 publications on record
Dmand AI links 11 papers to William Harmon, published from 2009 to 2013. The most frequent topics are Kidney Transplantation, Immunosuppressive Agents and Kidney Failure, Chronic. William Harmon has published most often in Am J Transplant. William Harmon's most frequent co-authors are Mark Richard Benfield, MD, Vikas Ramnath Dharnidharka, MD and Robert S. Mathias, MD.
Papers11
Years published2009 to 2013
William Harmon's papers by year, 2009 to 2013
Topics William Harmon writes about most
- Kidney Transplantation
- Immunosuppressive Agents
- Kidney Failure, Chronic
- Antibodies, Monoclonal
- Costa Rica
- Graft Rejection
- Graft Survival
- North America
William Harmon's most frequent co-authors
- Mark Richard Benfield, MD2 shared papers
- Vikas Ramnath Dharnidharka, MD2 shared papers
- Robert S. Mathias, MD2 shared papers
Recent publications by William Harmon
J Am Soc Nephrol
Advisory CommitteesAmbulatory Care FacilitiesKidney Failure, Chronic
J Am Soc Nephrol
Disease OutbreaksGlobal HealthKidney Diseases
See who William Harmon researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who William Harmon works with, so you can find a warm path to the right addiction psychiatry physicians.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
William Harmon received $86 in industry payments from 2017 to 2018
CMS Open Payments shows 3 general payments to William Harmon from 1 drug or device company from 2017 to 2018. Education make up the largest share, 82% of the total. Allergan Inc. paid the most, $86.
General payments to William Harmon by program year, 2017 to 2018
General payments to William Harmon by kind, 2017 to 2018
$86in total
- Education$7082%
- Food and beverage$1618%
Companies that paid William Harmon the most, 2017 to 2018
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
William Harmon graduated from David Geffen School of Medicine at UCLA
William Harmon graduated from David Geffen School of Medicine at UCLA in 1968.
- Medical school
- Board certified in psychiatry
Source: Dmand AI Professional Profile Data
William Harmon accepts plans from 1 insurance carrier
William Harmon is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
- CMS Medicare
Source: Dmand AI Insurance Network Data
Sources for William Harmon'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 |
| 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 | Medicare 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) |
| 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) |
| 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 William Harmon
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is William Harmon's NPI number?
William Harmon's NPI number is 1194883314. It was assigned on December 4, 2006, and it is active in the NPI Registry.
What does William Harmon specialize in?
William Harmon is an addiction psychiatry physician in Santa Cruz, California. The primary specialty in the NPI Registry is Addiction Psychiatry Physician (taxonomy code 2084P0802X).
Where does William Harmon practice?
William Harmon practices at 3120 Mission Dr, Santa Cruz, CA 95065-1824.
What is William Harmon's office phone number?
The practice phone on file for William Harmon is (831) 462-0164.
What is William Harmon's medical license number?
William Harmon's California license number on file is A23325.
Does William Harmon accept Medicare?
Yes. CMS data shows William Harmon billed Medicare for 630 services in 2024.
How many Medicare patients does William Harmon see?
CMS counts 36 Medicare patients who saw William Harmon in 2024, with an average age of 76.
Is William Harmon board certified?
Yes. William Harmon is board certified in psychiatry by the American Board of Psychiatry and Neurology.
What services does William Harmon bill to Medicare?
In 2024, William Harmon's most billed Medicare services were office visit, established patient (99213) and psychiatric service (90836).
Where did William Harmon go to medical school?
William Harmon graduated from David Geffen School of Medicine at UCLA in 1968.
Show 6 more questionsShow fewer questions
What drugs does William Harmon prescribe most?
In 2024 Medicare Part D data, William Harmon's most prescribed drugs by claims were Lorazepam, Fluoxetine HCl and Alprazolam.
Has William Harmon received payments from drug or device companies?
CMS Open Payments shows $86 in general payments to William Harmon from 1 company from 2017 to 2018. The largest total came from Allergan Inc.
How long has William Harmon been practicing?
William Harmon graduated from medical school in 1968, 58 years ago.
Does William Harmon do research?
Dmand AI links 11 publications to William Harmon, published from 2009 to 2013.
Who does William Harmon publish with?
William Harmon's most frequent co-authors are Mark Richard Benfield, MD (2 shared papers), Vikas Ramnath Dharnidharka, MD (2 shared papers) and Robert S. Mathias, MD (2 shared papers).
What insurance does William Harmon accept?
William Harmon is in network with 1 carrier, including CMS Medicare. Medicare plans come from the most carriers, 1. Check the plan with the practice before a visit.
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