Mary M. Hammel, FNP
- Medicare patients, 2024
- 39
- Part D claims, 2024
- 530
- Hospital affiliations
- 2
- Industry payments
- $150
- Medical groups
- 2
- Practice address
- 615 New Ballas Road, Saint Louis, MO 63141
- Practice phone
- Call (314) 251-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Mary Hammel'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.
Mary M. Hammel is a family nurse practitioner in Saint Louis, Missouri
Mary Hammel practices at Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy.
Mary Hammel's NPI, 1598067779, was assigned on November 22, 2010. Mary Hammel holds Missouri license 2010035829.
- NPI
- 1598067779NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2668653783
- NPI enumeration date
- November 22, 2010
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (314) 251-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 42
- Medical school graduation
- 2010
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Mary M. Hammel practices at Mercy Hospital St. Louis in Saint Louis, Missouri
Mary Hammel's primary practice is Mercy Hospital St. Louis, at 615 New Ballas Road, Saint Louis, MO 63141 in St. Louis County. The practice phone is (314) 251-6000.
- Mercy Hospital St. Louis615 New Ballas Road, Saint Louis, MO 63141 · St. Louis CountyPhone(314) 251-6000
Source: Dmand AI Affiliation Data
Mary M. Hammel is affiliated with 3 sites of care and 2 medical groups
Mary Hammel's primary practice is Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy. Mary Hammel is also affiliated with Mercy Hospital Washington. The medical group on file is Mercy Clinic East Communities. Dmand AI also links Mary Hammel to 1 more group practice or clinic 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 Mary M. Hammel's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mary Hammel practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Hospital St. Louis | 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 Mercy and 6.2K+ hospitals, with verified contacts in the same login.
Mary M. Hammel is one of 3,989 family nurse practitioners in Missouri
Family is Mary Hammel's primary specialty in the NPI Registry, under taxonomy code 363LF0000X. Mary Hammel is licensed in Missouri.
Specialties and state licenses
- Family nurse practitioner, MissouriPrimary
Family nurse practitioners near Mary Hammel
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
Mary M. Hammel treated 39 Medicare patients in 2024, average age 69
CMS counts 39 Medicare patients who saw Mary Hammel in 2024. The largest group is 65 to 74, with 16 patients. 74% of them have high blood pressure, and 74% have high cholesterol. Their average risk score is 1.55, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Mary Hammel's median patient age at 69, with 63% women.
Mary Hammel's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Mary Hammel's Medicare patients by sex, 2024
- Women2462%
- Men1538%
Chronic conditions among Mary Hammel's Medicare patients, 2024
- High blood pressure74%
- High cholesterol74%
- Anxiety49%
- Mood disorders41%
- Depression38%
- Arthritis36%
- Diabetes36%
- Chronic kidney disease31%
Share of Medicare patients with each condition. A patient can have several.
Mary Hammel's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women63%
- Men36%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Mary M. Hammel wrote 530 Medicare Part D claims in 2024
In 2024, Mary Hammel wrote 530 Medicare Part D claims for 134 patients. 89% of them were for generic drugs.
Mary Hammel's Part D claims by kind of drug, 2024
- Generic473 claims89%
- Brand-name and other57 claims11%
Drug classes CMS tracks in Mary Hammel's Part D claims, 2024
- Antibiotics5%26 of 530 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 Mary M. Hammel takes part in Medicare
Mary Hammel 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)
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Mary M. Hammel received $150 in industry payments in 2025
CMS Open Payments shows 9 general payments to Mary Hammel from 7 drug and device companies in 2025. Food and beverage make up the largest share, 100% of the total. AstraZeneca Pharmaceuticals LP paid the most, $33.
Companies that paid Mary Hammel 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 Mary M. Hammel'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 Mary M. Hammel
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mary M. Hammel's NPI number?
Mary M. Hammel's NPI number is 1598067779. It was assigned on November 22, 2010, and it is active in the NPI Registry.
What does Mary M. Hammel specialize in?
Mary M. Hammel is a family nurse practitioner in Saint Louis, Missouri. The primary specialty in the NPI Registry is Family Nurse Practitioner (taxonomy code 363LF0000X).
Where does Mary M. Hammel practice?
Mary Hammel practices at 615 New Ballas Road, Saint Louis, MO 63141. Mary Hammel's primary practice is Mercy Hospital St. Louis in Saint Louis, Missouri, part of Mercy. Dmand AI also links Mary Hammel to 1 group practice or clinic and 1 medical group.
What is Mary M. Hammel's office phone number?
The practice phone on file for Mary Hammel is (314) 251-6000.
What is Mary M. Hammel's medical license number?
Mary Hammel holds Missouri license 2010035829.
Which hospitals is Mary M. Hammel affiliated with?
Mary Hammel practices at Mercy Hospital St. Louis in Saint Louis, Missouri. Mary Hammel is also affiliated with Mercy Hospital Washington.
What medical group is Mary M. Hammel part of?
Mary Hammel is linked to Mercy Clinic East Communities. Dmand AI links Mary Hammel to 1 more medical group.
Does Mary M. Hammel accept Medicare?
Yes. CMS lists Mary Hammel as accepting Medicare assignment.
How many Medicare patients does Mary M. Hammel see?
CMS counts 39 Medicare patients who saw Mary Hammel in 2024, with an average age of 69.
Has Mary M. Hammel received payments from drug or device companies?
CMS Open Payments shows $150 in general payments to Mary Hammel from 7 companies from 2025 to 2025. The largest total came from AstraZeneca Pharmaceuticals LP.
How long has Mary M. Hammel been practicing?
Mary Hammel graduated from medical school in 2010, 16 years ago.
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