Dr. William Leonard Phillips, MD
- Medicare services, 2024
- 1,334
- Medicare patients, 2024
- 378
- Part D claims, 2024
- 8,917
- Hospital affiliations
- 1
- Industry payments
- $196
- Practice address
- 1233 N 30th St, Billings, MT 59101
- Practice phone
- Call (406) 237-7000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St Vincent Healthcare
Billings, Montana
Find Dr. Phillips' 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. William Leonard Phillips is a family medicine physician in Billings, Montana
Dr. Phillips practices at St Vincent Healthcare in Billings, Montana.
Dr. Phillips' NPI, 1831190685, was assigned on August 2, 2005. Dr. Phillips graduated from College of Osteo Med of the Pacific at Pomona in 1993. Dr. Phillips holds Montana license 12355.
- NPI
- 1831190685NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7113069535
- NPI enumeration date
- August 2, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (406) 237-7000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 59
- Medical school graduation
- 1993
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Leonard Phillips practices at St Vincent Healthcare in Billings, Montana
Dr. Phillips' primary practice is St Vincent Healthcare, at 1233 N 30th St, Billings, MT 59101 in Yellowstone County. The practice phone is (406) 237-7000.
- St Vincent Healthcare1233 N 30th St, Billings, MT 59101 · Yellowstone CountyPhone(406) 237-7000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William Leonard Phillips is affiliated with 8 sites of care and 2 medical groups
Dr. Phillips' primary practice is St Vincent Healthcare in Billings, Montana. Dr. Phillips is also affiliated with St. Vincent Regional Hospital. The medical group on file is SCL Health Medical Group. Dmand AI also links Dr. Phillips to 2 more group practices and clinics, 2 home health agencies, 1 hospice, 1 skilled nursing facility 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 Dr. William Leonard Phillips' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Phillips practices, 7 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St Vincent Healthcare | Available with a free account |
| +7 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Leonard Phillips is one of 675 family medicine physicians in Montana
Family medicine is Dr. Phillips' primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Phillips is licensed in Montana.
Specialties and state licenses
- Family medicine, MontanaPrimary
Family medicine physicians near Dr. Phillips
Counts of family medicine 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. William Leonard Phillips billed Medicare for 1,334 services in 2024
CMS data shows 1,334 Medicare services from Dr. Phillips across 11 procedure codes in 2024, for 378 Medicare patients. Medicare paid $50,251 for them. Every service was in an office.
Dr. Phillips' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 6782024: 7074%
- Other services
- 2023: 2612024: 2859%
- Drugs given in the office
- 2023: 862024: 172100%
- Tests and treatments
- 2023: 1182024: 1299%
- Surgery
- 2023: 332024: 4124%
Dr. Phillips compared with the Montana median for family medicine physicians, 2024
- Dr. Phillips
- Montana median
- Medicare services
- 1,334vs 3044.4 times
- Medicare patients
- 378vs 1722.2 times
- Part D claims
- 8,274vs 75211.0 times
Medians across 706 family medicine physicians in Montana with Dmand AI profiles that report each measure.
Dr. Phillips' 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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Phillips and other family medicine physicians in Montana.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Leonard Phillips treated 378 Medicare patients in 2024, average age 75
CMS counts 378 Medicare patients who saw Dr. Phillips in 2024. The largest group is 65 to 74, with 166 patients. 67% of them have high blood pressure, and 58% have high cholesterol. 7% are also on Medicaid. Their average risk score is 0.94, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Phillips' median patient age at 75, with 46% women.
Dr. Phillips' Medicare patients by age, 2024
Dr. Phillips' Medicare patients by sex, 2024
- Women14939%
- Men22961%
Chronic conditions among Dr. Phillips' Medicare patients, 2024
- High blood pressure67%
- High cholesterol58%
- Arthritis28%
- Diabetes23%
- Anxiety22%
- Ischemic heart disease22%
- Mood disorders21%
- Depression20%
Share of Medicare patients with each condition. A patient can have several.
Dr. Phillips' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 75
Patient panel by sex, all payers
- Women46%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. William Leonard Phillips wrote 8,917 Medicare Part D claims in 2024
In 2024, Dr. Phillips wrote 8,917 Medicare Part D claims for 657 patients. 87% of them were for generic drugs. CMS names the drug for 8,274 of them, across 140 drugs with 11 or more claims each, at $806,990 in total drug cost. In 2023, CMS named 7,669 claims across 131 drugs.
Dr. Phillips' Part D claims by kind of drug, 2024
- Generic7,783 claims87%
- Brand-name1,075 claims12%
- Other59 claims1%
Dr. Phillips' 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 Dr. Phillips' Part D claims, 2024
- Opioids5%406 of 8,917 claims
- Antibiotics2%143 of 8,917 claims
- Antipsychotics, patients 65 and over1%60 of 8,917 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 7,6692024: 8,2748%
Drugs named by CMS: 140 in 2024, 131 in 2023.
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
How Dr. William Leonard Phillips takes part in Medicare
Dr. Phillips accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Removal of skin lesions: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. William Leonard Phillips received $196 in industry payments from 2018 to 2024
CMS Open Payments shows 5 general payments to Dr. Phillips from 4 drug and device companies from 2018 to 2024. Food and beverage make up the largest share, 100% of the total. Horizon Pharma plc paid the most, $125.
General payments to Dr. Phillips by program year, 2018 to 2024
Companies that paid Dr. Phillips the most, 2018 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Leonard Phillips graduated from College of Osteo Med of the Pacific at Pomona
Dr. Phillips graduated from College of Osteo Med of the Pacific at Pomona in 1993.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Leonard Phillips'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 services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| 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 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 percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| 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. William Leonard Phillips
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. William Leonard Phillips' NPI number?
Dr. William Leonard Phillips' NPI number is 1831190685. It was assigned on August 2, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. William Leonard Phillips?
Dr. William Leonard Phillips is a family medicine physician in Billings, Montana. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. William Leonard Phillips practice?
Dr. Phillips practices at 1233 N 30th St, Billings, MT 59101. Dr. Phillips' primary practice is St Vincent Healthcare in Billings, Montana. Dmand AI also links Dr. Phillips to 2 group practices and clinics, 2 home health agencies, 1 hospice, 1 skilled nursing facility and 1 medical group.
What is Dr. William Leonard Phillips' office phone number?
The practice phone on file for Dr. Phillips is (406) 237-7000.
What is Dr. William Leonard Phillips' medical license number?
Dr. Phillips holds Montana license 12355.
Which hospitals is Dr. William Leonard Phillips affiliated with?
Dr. Phillips is affiliated with St. Vincent Regional Hospital.
What medical group is Dr. William Leonard Phillips part of?
Dr. Phillips is linked to SCL Health Medical Group. Dmand AI links Dr. Phillips to 1 more medical group.
Does Dr. William Leonard Phillips accept Medicare?
Yes. CMS data shows Dr. Phillips billed Medicare for 1,334 services in 2024, and Dr. Phillips accepts Medicare assignment.
How many Medicare patients does Dr. William Leonard Phillips see?
CMS counts 378 Medicare patients who saw Dr. Phillips in 2024, with an average age of 75.
What services does Dr. William Leonard Phillips bill to Medicare?
In 2024, Dr. Phillips' most billed Medicare services were office visit, established patient (99214), medicare service (G0439) and office visit, established patient (99215).
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Where did Dr. William Leonard Phillips go to medical school?
Dr. Phillips graduated from College of Osteo Med of the Pacific at Pomona in 1993.
What drugs does Dr. William Leonard Phillips prescribe most?
In 2024 Medicare Part D data, Dr. Phillips' most prescribed drugs by claims were Atorvastatin Calcium, Amlodipine Besylate and Gabapentin.
Has Dr. William Leonard Phillips received payments from drug or device companies?
CMS Open Payments shows $196 in general payments to Dr. Phillips from 4 companies from 2018 to 2024. The largest total came from Horizon Pharma plc.
How long has Dr. William Leonard Phillips been practicing?
Dr. Phillips graduated from medical school in 1993, 33 years ago.
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