John A. Greco, PA-C
- Medicare patients, 2024
- 55
- Part D claims, 2024
- 281
- Hospital affiliations
- 1
- Industry payments
- $20
- Medical groups
- 2
- Practice address
- 900 Caton Avenue, Baltimore, MD 21229
- Practice phone
- Call (410) 368-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find John Greco'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.
John A. Greco is a physician assistant in Baltimore, Maryland
John Greco practices at Ascension Saint Agnes Hospital in Baltimore, Maryland, part of Ascension Health Alliance.
John Greco's NPI, 1811954167, was assigned on April 28, 2006. John Greco holds Maryland license C00003051.
- NPI
- 1811954167NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0244283414
- NPI enumeration date
- April 28, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (410) 368-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
John A. Greco practices at Ascension Saint Agnes Hospital in Baltimore, Maryland
John Greco's primary practice is Ascension Saint Agnes Hospital, at 900 Caton Avenue, Baltimore, MD 21229 in Baltimore City. The practice phone is (410) 368-6000.
- Ascension Saint Agnes Hospital900 Caton Avenue, Baltimore, MD 21229 · Baltimore CityPhone(410) 368-6000
Source: Dmand AI Affiliation Data
John A. Greco is affiliated with 3 sites of care and 2 medical groups
John Greco's primary practice is Ascension Saint Agnes Hospital in Baltimore, Maryland, part of Ascension Health Alliance. The medical group on file is Integrated Specialists Group. Dmand AI also links John Greco to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at John A. Greco's practice
Dmand AI tracks the electronic health record (EHR) system at each site where John Greco practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Ascension Saint Agnes Hospital | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Ascension Health Alliance and 6.2K+ hospitals, with verified contacts in the same login.
John A. Greco is one of 2,452 physician assistants in Maryland
Physician assistant is John Greco's primary specialty in the NPI Registry, under taxonomy code 363A00000X. John Greco is licensed in Maryland.
Specialties and state licenses
- Physician assistant, MarylandPrimary
Physician assistants near John Greco
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
John A. Greco treated 55 Medicare patients in 2024, average age 73
CMS counts 55 Medicare patients who saw John Greco in 2024. The largest group is 65 to 74, with 30 patients. 75% of them have arthritis, and 75% have high blood pressure. Their average risk score is 1.14, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts John Greco's median patient age at 70, with 67% women.
John Greco's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
John Greco's Medicare patients by sex, 2024
- Women2953%
- Men2647%
Chronic conditions among John Greco's Medicare patients, 2024
- Arthritis75%
- High blood pressure75%
- High cholesterol75%
- Diabetes38%
- Mood disorders38%
- Depression35%
- Anxiety33%
- Ischemic heart disease31%
Share of Medicare patients with each condition. A patient can have several.
John Greco's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 70
Patient panel by sex, all payers
- Women67%
- Men33%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
John A. Greco wrote 281 Medicare Part D claims in 2024
In 2024, John Greco wrote 281 Medicare Part D claims for 145 patients. 99% of them were for generic drugs.
John Greco's Part D claims by kind of drug, 2024
- Generic277 claims99%
- Brand-name and other4 claims1%
Drug classes CMS tracks in John Greco's Part D claims, 2024
- Opioids47%133 of 281 claims
- Antibiotics19%52 of 281 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How John A. Greco takes part in Medicare
John Greco accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
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John A. Greco received $20 in industry payments in 2025
CMS Open Payments shows 1 general payment to John Greco from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Heron Therapeutics, Inc. paid the most, $20.
Companies that paid John Greco the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for John A. Greco'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 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 (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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 John A. Greco
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is John A. Greco's NPI number?
John A. Greco's NPI number is 1811954167. It was assigned on April 28, 2006, and it is active in the NPI Registry.
What does John A. Greco specialize in?
John A. Greco is a physician assistant in Baltimore, Maryland. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does John A. Greco practice?
John Greco practices at 900 Caton Avenue, Baltimore, MD 21229. John Greco's primary practice is Ascension Saint Agnes Hospital in Baltimore, Maryland, part of Ascension Health Alliance. Dmand AI also links John Greco to 2 group practices and clinics and 1 medical group.
What is John A. Greco's office phone number?
The practice phone on file for John Greco is (410) 368-6000.
What is John A. Greco's medical license number?
John Greco holds Maryland license C00003051.
Which hospitals is John A. Greco affiliated with?
John Greco practices at Ascension Saint Agnes Hospital in Baltimore, Maryland.
What medical group is John A. Greco part of?
John Greco is linked to Integrated Specialists Group. Dmand AI links John Greco to 1 more medical group.
Does John A. Greco accept Medicare?
Yes. CMS lists John Greco as accepting Medicare assignment.
How many Medicare patients does John A. Greco see?
CMS counts 55 Medicare patients who saw John Greco in 2024, with an average age of 73.
Has John A. Greco received payments from drug or device companies?
CMS Open Payments shows $20 in general payments to John Greco from 1 company from 2025 to 2025. The largest total came from Heron Therapeutics, Inc.
How long has John A. Greco been practicing?
John Greco graduated from medical school in 2004, 22 years ago.
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