Dr. Margaret Kathleen Siska, MD
- Hospital affiliations
- 2
- Industry payments
- $513
- Medical groups
- 2
- State license
- 1
- Year NPI issued
- 2008
- Practice address
- 2800 10th Ave N, Billings, MT 59101
- Practice phone
- Call (406) 657-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Siska'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.
Dr. Margaret Kathleen Siska is a pediatric endocrinology physician in Billings, Montana
Dr. Siska practices at Billings Clinic Hospital in Billings, Montana, part of Billings Clinic.
Dr. Siska's NPI, 1013195122, was assigned on January 31, 2008. Dr. Siska holds Missouri license 2013030082.
- NPI
- 1013195122NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1153557798
- NPI enumeration date
- January 31, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (406) 657-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 45
- Medical school graduation
- 2007
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Margaret Kathleen Siska practices at Billings Clinic Hospital in Billings, Montana
Dr. Siska's primary practice is Billings Clinic Hospital, at 2800 10th Ave N, Billings, MT 59101 in Yellowstone County. The practice phone is (406) 657-4000.
- Billings Clinic Hospital2800 10th Ave N, Billings, MT 59101 · Yellowstone CountyPhone(406) 657-4000
Source: Dmand AI Affiliation Data
Dr. Margaret Kathleen Siska is affiliated with 3 sites of care and 2 medical groups
Dr. Siska's primary practice is Billings Clinic Hospital in Billings, Montana, part of Billings Clinic. Dr. Siska is also affiliated with Billings Clinic Broadwater. The medical group on file is Billings Clinic. Dmand AI also links Dr. Siska 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 Dr. Margaret Kathleen Siska's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Siska practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Billings Clinic 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 Billings Clinic and 6.2K+ hospitals, with verified contacts in the same login.
Dr. Margaret Kathleen Siska is one of 4 pediatric endocrinology physicians in Montana
Pediatric endocrinology is Dr. Siska's primary specialty in the NPI Registry, under taxonomy code 2080P0205X. Dr. Siska is licensed in Missouri.
Specialties and state licenses
- Pediatric endocrinology, MissouriPrimary
Pediatric endocrinology physicians near Dr. Siska
Counts of pediatric endocrinology physicians 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
Dr. Margaret Kathleen Siska's patients have a median age of 15
Across all payers, Dmand AI patient panel data puts Dr. Siska's median patient age at 15, with 51% women.
Dr. Siska's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 15
Patient panel by sex, all payers
- Women51%
- Men49%
Source: Dmand AI Patient Panel Data
How Dr. Margaret Kathleen Siska takes part in Medicare
Dr. Siska 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)
Dr. Margaret Kathleen Siska received $513 in industry payments from 2022 to 2025
CMS Open Payments shows 12 general payments to Dr. Siska from 7 drug and device companies from 2022 to 2025. Food and beverage make up the largest share, 89% of the total. Medtronic, Inc. paid the most, $214.
General payments to Dr. Siska by program year, 2022 to 2025
General payments to Dr. Siska by kind, 2022 to 2025
- Food and beverage$45789%
- Education$5611%
Companies that paid Dr. Siska the most, 2022 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Margaret Kathleen Siska'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 Data |
| 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 Dr. Margaret Kathleen Siska
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Margaret Kathleen Siska's NPI number?
Dr. Margaret Kathleen Siska's NPI number is 1013195122. It was assigned on January 31, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Margaret Kathleen Siska?
Dr. Margaret Kathleen Siska is a pediatric endocrinology physician in Billings, Montana. The primary specialty in the NPI Registry is Pediatric Endocrinology Physician (taxonomy code 2080P0205X).
Where does Dr. Margaret Kathleen Siska practice?
Dr. Siska practices at 2800 10th Ave N, Billings, MT 59101. Dr. Siska's primary practice is Billings Clinic Hospital in Billings, Montana, part of Billings Clinic. Dmand AI also links Dr. Siska to 1 group practice or clinic and 1 medical group.
What is Dr. Margaret Kathleen Siska's office phone number?
The practice phone on file for Dr. Siska is (406) 657-4000.
What is Dr. Margaret Kathleen Siska's medical license number?
Dr. Siska holds Missouri license 2013030082.
Which hospitals is Dr. Margaret Kathleen Siska affiliated with?
Dr. Siska practices at Billings Clinic Hospital in Billings, Montana. Dr. Siska is also affiliated with Billings Clinic Broadwater.
What medical group is Dr. Margaret Kathleen Siska part of?
Dr. Siska is linked to Billings Clinic. Dmand AI links Dr. Siska to 1 more medical group.
Does Dr. Margaret Kathleen Siska accept Medicare?
Yes. CMS lists Dr. Siska as accepting Medicare assignment.
Has Dr. Margaret Kathleen Siska received payments from drug or device companies?
CMS Open Payments shows $513 in general payments to Dr. Siska from 7 companies from 2022 to 2025. The largest total came from Medtronic, Inc.
How long has Dr. Margaret Kathleen Siska been practicing?
Dr. Siska graduated from medical school in 2007, 19 years ago.
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