Joseph J. Demarco

  • Los Angeles, CA
  • Physician assistant
NPI1861933665PAC ID4880966746
Medicare services, 2024
87
Medicare patients, 2024
66
Part D claims, 2024
446
Hospital affiliations
1
Medical group
1
Practice address
344 S Hauser Blvd, Los Angeles, CA 90036
Practice phone
Call (716) 845-2300
Professional email
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Personal email
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Mobile number
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Social profiles

Primary practice

Roswell Park Cancer Institute

Los Angeles, California

See all 3 affiliations

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Joseph J. Demarco is a physician assistant in Los Angeles, California

Joseph Demarco practices at Roswell Park Cancer Institute in Los Angeles, California.

Joseph Demarco's NPI, 1861933665, was assigned on March 13, 2017.

NPI and contact details
Medicare PAC ID
4880966746
NPI enumeration date
March 13, 2017
NPI status
Active
Accepts Medicare assignment
Yes
Offers telehealth
Yes
Practice phone
(716) 845-2300
Professional email
Get email
Personal email
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Mobile number
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Sex
Male
Estimated age
35
Medical school graduation
2017

Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)

Joseph J. Demarco practices at Roswell Park Cancer Institute in Los Angeles, California

Joseph Demarco's primary practice is Roswell Park Cancer Institute, at 344 S Hauser Blvd, Los Angeles, CA 90036 in Los Angeles County. The practice phone is (716) 845-2300.

  • Roswell Park Cancer Institute
    344 S Hauser Blvd, Los Angeles, CA 90036 · Los Angeles CountyPhone(716) 845-2300

Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data

Joseph J. Demarco is affiliated with 2 sites of care and 1 medical group

Joseph Demarco's primary practice is Roswell Park Cancer Institute in Los Angeles, California. Joseph Demarco is also affiliated with Roswell Park Comprehensive Cancer Center. The medical group on file is Roswell Park Comprehensive Cancer Center.

See all 3 affiliations for Joseph Demarco

Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data

Dmand AI tracks the EHR system at Joseph J. Demarco's practice

Dmand AI tracks the electronic health record (EHR) system at each site where Joseph Demarco practices. Vendor and product names are available with a free account.

EHR by site
SiteEHR vendor and product
Roswell Park Cancer InstituteAvailable with a free account
+1 more affiliated siteAvailable with a free account

Source: Dmand AI Technology Install Data

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Joseph J. Demarco is one of 11,482 physician assistants in California

Physician assistant is Joseph Demarco's primary specialty in the NPI Registry, under taxonomy code 363A00000X.

Specialties and state licenses

  • Physician assistantPrimarytaxonomy 363A00000X

Clinical focus

Dmand AI lists tobacco use among the conditions Joseph Demarco treats.

Physician assistants near Joseph Demarco

Counts of physician assistants 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

Joseph J. Demarco billed Medicare for 87 services in 2024

CMS data shows 87 Medicare services from Joseph Demarco across 1 procedure code in 2024, all of them office visits, for 66 Medicare patients. Medicare paid $7,831 for them. Every service was in a facility, such as a hospital, rather than an office.

Medicare services, 202487
Medicare patients66
Paid by Medicare$7,831
Procedure codes1

Joseph Demarco compared with the California median for physician assistants, 2024

  • Joseph Demarco
  • California median
Medicare services
87vs 20457% below
Medicare patients
66vs 10537% below
Part D claims
288vs 24319% above

Medians across 7,065 physician assistants in California with Dmand AI profiles that report each measure.

Joseph Demarco'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.

See all procedures by Joseph Demarco

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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks

Joseph J. Demarco treated 66 Medicare patients in 2024, average age 73

CMS counts 66 Medicare patients who saw Joseph Demarco in 2024. The largest group is 65 to 74, with 34 patients. 75% of them have high cholesterol, and 71% have high blood pressure. 21% are also on Medicaid. Their average risk score is 2.24, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.

Across all payers, Dmand AI patient panel data puts Joseph Demarco's median patient age at 71, with 47% women.

Medicare patients, 202466
Average age73
Average risk score2.24
Also on Medicaid21%

Joseph Demarco's Medicare patients by age, 2024

CMS leaves out age groups with fewer than 11 patients.

Joseph Demarco's Medicare patients by sex, 2024

  • Women3147%
  • Men3553%

Chronic conditions among Joseph Demarco's Medicare patients, 2024

  1. High cholesterol75%
  2. High blood pressure71%
  3. Arthritis39%
  4. Ischemic heart disease36%
  5. COPD35%
  6. Diabetes35%
  7. Anxiety32%
  8. Mood disorders30%

Share of Medicare patients with each condition. A patient can have several.

Joseph Demarco's patients across all payers

Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.

Patient panel by age, all payers

Median age 71

Patient panel by sex, all payers

  • Women47%
  • Men53%

Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data

Joseph J. Demarco wrote 446 Medicare Part D claims in 2024

In 2024, Joseph Demarco wrote 446 Medicare Part D claims for 117 patients. 60% of them were for generic drugs. CMS names the drug for 288 of them, across 9 drugs with 11 or more claims each, at $1,740,204 in total drug cost.

Part D claims, 2024446
Drugs named by CMS9
Total drug cost$1.7M
Part D patients117

Joseph Demarco's Part D claims by kind of drug, 2024

  • Generic269 claims60%
  • Brand-name and other177 claims40%

Joseph Demarco'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 Joseph Demarco's Part D claims, 2024

  • Antibiotics14%61 of 446 claims

Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.

See all prescribing by Joseph Demarco

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

Joseph J. Demarco offers telehealth to Medicare patients

Joseph Demarco accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Joseph Demarco as offering telehealth.

Accepts Medicare assignment
Yes
Offers telehealth
Yes

Source: Doctors and Clinicians National Downloadable File (CMS)

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Sources for Joseph J. Demarco's profile data

Sources for the data on this page
Data on this pageSource
NPI, name, sex, specialty and licensesNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data
Practice locations and phoneNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data
Primary practice, affiliations and health systemNPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data
Medicare services and procedure codesMedicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab)
State medians for the same specialtyDmand AI Peer Benchmarks
Medicare patients and the all-payer patient panelDmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab)
Part D prescribingMedicare 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 percentilesDoctors and Clinicians National Downloadable File (CMS) (opens in a new tab)
EHR at each practice siteDmand AI Technology Install Data
Similar physiciansDmand AI Affiliation Data

Data last refreshed October 2026Report an inaccuracyRemove my information

FAQ

Frequently asked questions about Joseph J. Demarco

Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.

What is Joseph J. Demarco's NPI number?

Joseph J. Demarco's NPI number is 1861933665. It was assigned on March 13, 2017, and it is active in the NPI Registry.

What does Joseph J. Demarco specialize in?

Joseph J. Demarco is a physician assistant in Los Angeles, California. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).

Where does Joseph J. Demarco practice?

Joseph Demarco practices at 344 S Hauser Blvd, Los Angeles, CA 90036. Joseph Demarco's primary practice is Roswell Park Cancer Institute in Los Angeles, California.

What is Joseph J. Demarco's office phone number?

The practice phone on file for Joseph Demarco is (716) 845-2300.

Which hospitals is Joseph J. Demarco affiliated with?

Joseph Demarco is affiliated with Roswell Park Comprehensive Cancer Center.

What medical group is Joseph J. Demarco part of?

Joseph Demarco is linked to Roswell Park Comprehensive Cancer Center.

Does Joseph J. Demarco accept Medicare?

Yes. CMS data shows Joseph Demarco billed Medicare for 87 services in 2024, and Joseph Demarco accepts Medicare assignment.

Does Joseph J. Demarco offer telehealth?

Yes. The CMS Doctors and Clinicians file lists Joseph Demarco as offering telehealth services.

How many Medicare patients does Joseph J. Demarco see?

CMS counts 66 Medicare patients who saw Joseph Demarco in 2024, with an average age of 73.

What services does Joseph J. Demarco bill to Medicare?

In 2024, Joseph Demarco's most billed Medicare services were office visit, established patient (99215).

What drugs does Joseph J. Demarco prescribe most?

In 2024 Medicare Part D data, Joseph Demarco's most prescribed drugs by claims were Venclexta, Calquence and Acyclovir.

How long has Joseph J. Demarco been practicing?

Joseph Demarco graduated from medical school in 2017, 9 years ago.

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