Maria S. Koen, NP
- Medicare patients, 2024
- 115
- Part D claims, 2024
- 1,754
- Hospital affiliations
- 1
- Industry payments
- $258
- Medical groups
- 2
- Practice address
- 1 Joslin Pl, Boston, MA 02215
- Practice phone
- Call (617) 732-2501
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Joslin Clinic Inc
Boston, Massachusetts
Find Maria Koen'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.
Maria S. Koen is a family nurse practitioner in Boston, Massachusetts
Maria Koen practices at Joslin Clinic Inc in Boston, Massachusetts.
Maria Koen's NPI, 1891833935, was assigned on February 1, 2007. Maria Koen holds Massachusetts license 239263.
- NPI
- 1891833935NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5991808420
- NPI enumeration date
- February 1, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (617) 732-2501
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 46
- Medical school graduation
- 2006
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Maria S. Koen practices at Joslin Clinic Inc in Boston, Massachusetts
Maria Koen's primary practice is Joslin Clinic Inc, at 1 Joslin Pl, Boston, MA 02215 in Suffolk County. The practice phone is (617) 732-2501.
- Joslin Clinic Inc1 Joslin Pl, Boston, MA 02215 · Suffolk CountyPhone(617) 732-2501
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Maria S. Koen is affiliated with 4 sites of care and 2 medical groups
Maria Koen's primary practice is Joslin Clinic Inc in Boston, Massachusetts. Maria Koen is also affiliated with Beth Israel Deaconess Medical Center. The medical group on file is Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center (HMFP). Dmand AI also links Maria Koen to 2 more group practices and clinics and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Maria S. Koen's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Maria Koen practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Joslin Clinic Inc | Available with a free account |
| +3 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Maria S. Koen is one of 3,644 family nurse practitioners in Massachusetts
Family is Maria Koen's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Maria Koen is licensed in Massachusetts.
Specialties and state licenses
- Family nurse practitioner, MassachusettsPrimary
Family nurse practitioners near Maria Koen
Counts of family nurse practitioners 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
Maria S. Koen treated 115 Medicare patients in 2024, average age 71
CMS counts 115 Medicare patients who saw Maria Koen in 2024. The largest group is 65 to 74, with 45 patients. 75% of them have diabetes, and 75% have high blood pressure. 46% are also on Medicaid. Their average risk score is 1.67, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Maria Koen's median patient age at 60, with 56% women.
Maria Koen's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Maria Koen's Medicare patients by sex, 2024
- Women5850%
- Men5750%
Chronic conditions among Maria Koen's Medicare patients, 2024
- Diabetes75%
- High blood pressure75%
- High cholesterol75%
- Chronic kidney disease46%
- Arthritis38%
- Mood disorders38%
- Depression36%
- Ischemic heart disease34%
Share of Medicare patients with each condition. A patient can have several.
Maria Koen's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 60
Patient panel by sex, all payers
- Women56%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Maria S. Koen wrote 1,754 Medicare Part D claims in 2024
In 2024, Maria Koen wrote 1,754 Medicare Part D claims for 234 patients. 25% of them were for generic drugs.
Maria Koen's Part D claims by kind of drug, 2024
- Generic432 claims25%
- Brand-name1,107 claims63%
- Other215 claims12%
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
Maria S. Koen offers telehealth to Medicare patients
Maria Koen accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Maria Koen as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Maria S. Koen received $258 in industry payments in 2025
CMS Open Payments shows 3 general payments to Maria Koen from 3 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. Insulet Corporation paid the most, $121.
Companies that paid Maria Koen 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 Maria S. Koen'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 |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation 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 Maria S. Koen
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Maria S. Koen's NPI number?
Maria S. Koen's NPI number is 1891833935. It was assigned on February 1, 2007, and it is active in the NPI Registry.
What does Maria S. Koen specialize in?
Maria S. Koen is a family nurse practitioner in Boston, Massachusetts. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Maria S. Koen practice?
Maria Koen practices at 1 Joslin Pl, Boston, MA 02215. Maria Koen's primary practice is Joslin Clinic Inc in Boston, Massachusetts. Dmand AI also links Maria Koen to 2 group practices and clinics and 1 medical group.
What is Maria S. Koen's office phone number?
The practice phone on file for Maria Koen is (617) 732-2501.
What is Maria S. Koen's medical license number?
Maria Koen holds Massachusetts license 239263.
Which hospitals is Maria S. Koen affiliated with?
Maria Koen is affiliated with Beth Israel Deaconess Medical Center.
What medical group is Maria S. Koen part of?
Maria Koen is linked to Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center (HMFP). Dmand AI links Maria Koen to 1 more medical group.
Does Maria S. Koen accept Medicare?
Yes. CMS lists Maria Koen as accepting Medicare assignment.
Does Maria S. Koen offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Maria Koen as offering telehealth services.
How many Medicare patients does Maria S. Koen see?
CMS counts 115 Medicare patients who saw Maria Koen in 2024, with an average age of 71.
Has Maria S. Koen received payments from drug or device companies?
CMS Open Payments shows $258 in general payments to Maria Koen from 3 companies from 2025 to 2025. The largest total came from Insulet Corporation.
How long has Maria S. Koen been practicing?
Maria Koen graduated from medical school in 2006, 20 years ago.
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