Dr. Stephen Howard Karshbaum, MD
- Medicare services, 2024
- 26,242
- Medicare patients, 2024
- 1,571
- Hospital affiliations
- 3
- Medical groups
- 8
- State licenses
- 2
- Practice address
- 909 South 336th St. Ste. B101, Federal Way, WA 98003
- Practice phone
- Call (206) 524-5599
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
RAYUS Radiology - Federal Way Breast Center
Mammography / Breast Imaging Center · Federal Way, Washington
Find Dr. Karshbaum'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. Stephen Howard Karshbaum is a diagnostic radiologist in Woburn, Massachusetts
Dr. Karshbaum practices at RAYUS Radiology - Federal Way Breast Center in Federal Way, Washington.
Dr. Karshbaum's NPI, 1124032271, was assigned on July 27, 2006. Dr. Karshbaum graduated from Tufts University School of Medicine in 1991. Dr. Karshbaum holds Massachusetts license 78711.
- NPI
- 1124032271NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2769466853
- NPI enumeration date
- July 27, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (206) 524-5599
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 61
- Medical school graduation
- 1991
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen Howard Karshbaum practices in Federal Way and Woburn
Dr. Karshbaum's primary practice is RAYUS Radiology - Federal Way Breast Center, at 909 South 336th St. Ste. B101, Federal Way, WA 98003. The practice phone is (206) 524-5599. Dr. Karshbaum also practices at RAYUS Radiology, 800 W Cummings Park, Woburn, MA 01801.
- RAYUS Radiology - Federal Way Breast CenterPrimary909 South 336th St. Ste. B101, Federal Way, WA 98003Phone(206) 524-5599
- RAYUS Radiology800 W Cummings Park, Woburn, MA 01801 · Middlesex CountyPhone(781) 329-0600
Sources: NPPES NPI Registry (CMS); Dmand AI Affiliation Data; and Dmand AI Practice Data
Dr. Stephen Howard Karshbaum is affiliated with 8 sites of care and 8 medical groups
Dr. Karshbaum's primary practice is RAYUS Radiology - Federal Way Breast Center in Federal Way, Washington. Dr. Karshbaum is also affiliated with Boston Medical Center - Brighton. The medical group on file is RAYUS Radiology. Dmand AI also links Dr. Karshbaum to 2 more hospitals, 7 medical groups and 4 group practices and clinics, 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. Stephen Howard Karshbaum's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Karshbaum practices, 8 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| RAYUS Radiology - Federal Way Breast Center | Available with a free account |
| +7 more sites and 7 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Stephen Howard Karshbaum is one of 1,246 diagnostic radiologists in Massachusetts
Diagnostic radiology is Dr. Karshbaum's primary specialty in the NPI Registry, under taxonomy code 2085R0202X. Dmand AI has Dr. Karshbaum's licenses on file in 2 states: Massachusetts and Rhode Island.
Specialties and state licenses
- Diagnostic radiology, MassachusettsPrimary
- Rhode Island license
Diagnostic radiologists near Dr. Karshbaum
Counts of diagnostic radiologists 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. Stephen Howard Karshbaum billed Medicare for 26,242 services in 2024
CMS data shows 26,242 Medicare services from Dr. Karshbaum across 29 procedure codes in 2024, for 1,571 Medicare patients. Medicare paid $120,550 for them.
Dr. Karshbaum's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Other services
- 2023: 25,2832024: 24,2084%
- Imaging
- 2023: 2,7662024: 1,92630%
- Tests and treatments
- 2023: 1752024: 10838%
Where Dr. Karshbaum's Medicare services took place, 2024
- In an office24,54094%
- In a facility1,7026%
Dr. Karshbaum compared with the Massachusetts median for diagnostic radiologists, 2024
- Dr. Karshbaum
- Massachusetts median
- Medicare services
- 26,242vs 2,24211.7 times
- Medicare patients
- 1,571vs 1,571Close to median
Medians across 1,108 diagnostic radiologists in Massachusetts with Dmand AI profiles that report each measure.
Dr. Karshbaum's 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. Karshbaum and other diagnostic radiologists in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen Howard Karshbaum treated 1,571 Medicare patients in 2024, average age 74
CMS counts 1,571 Medicare patients who saw Dr. Karshbaum in 2024. The largest group is 65 to 74, with 541 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 40% are also on Medicaid. Their average risk score is 1.74, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Karshbaum's median patient age at 58, with 54% women.
Dr. Karshbaum's Medicare patients by age, 2024
Dr. Karshbaum's Medicare patients by sex, 2024
- Women91958%
- Men65242%
Chronic conditions among Dr. Karshbaum's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis58%
- Anxiety47%
- Mood disorders45%
- Depression41%
- Diabetes36%
- Ischemic heart disease34%
Share of Medicare patients with each condition. A patient can have several.
Dr. Karshbaum's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 58
Patient panel by sex, all payers
- Women54%
- Men44%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Stephen Howard Karshbaum takes part in Medicare
Dr. Karshbaum 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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Dr. Stephen Howard Karshbaum graduated from Tufts University School of Medicine
Dr. Karshbaum graduated from Tufts University School of Medicine in 1991.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Stephen Howard Karshbaum'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 Affiliation DataDmand AI Practice Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy 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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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. Stephen Howard Karshbaum
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What is Dr. Stephen Howard Karshbaum's NPI number?
Dr. Stephen Howard Karshbaum's NPI number is 1124032271. It was assigned on July 27, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen Howard Karshbaum?
Dr. Stephen Howard Karshbaum is a diagnostic radiologist in Woburn, Massachusetts. The primary specialty in the NPI Registry is Diagnostic Radiology Physician (taxonomy code 2085R0202X).
Where does Dr. Stephen Howard Karshbaum practice?
Dr. Karshbaum practices at 909 South 336th St. Ste. B101, Federal Way, WA 98003. Dr. Karshbaum also practices at 800 W Cummings Park, Woburn, MA 01801. Dr. Karshbaum's primary practice is RAYUS Radiology - Federal Way Breast Center in Federal Way, Washington. Dmand AI also links Dr. Karshbaum to 2 hospitals, 7 medical groups and 4 group practices and clinics.
What is Dr. Stephen Howard Karshbaum's office phone number?
The practice phone on file for Dr. Karshbaum is (206) 524-5599.
What is Dr. Stephen Howard Karshbaum's medical license number?
Dr. Karshbaum holds Massachusetts license 78711, one of the licenses on file in 2 states.
Which states has Dr. Stephen Howard Karshbaum been licensed in?
Dmand AI has state licenses on file for Dr. Karshbaum in Massachusetts and Rhode Island.
Which hospitals is Dr. Stephen Howard Karshbaum affiliated with?
Dr. Karshbaum is affiliated with Boston Medical Center - Brighton. Dmand AI links Dr. Karshbaum to 2 more hospitals.
What medical group is Dr. Stephen Howard Karshbaum part of?
Dr. Karshbaum is linked to RAYUS Radiology. Dmand AI links Dr. Karshbaum to 7 more medical groups.
Does Dr. Stephen Howard Karshbaum accept Medicare?
Yes. CMS data shows Dr. Karshbaum billed Medicare for 26,242 services in 2024, and Dr. Karshbaum accepts Medicare assignment.
How many Medicare patients does Dr. Stephen Howard Karshbaum see?
CMS counts 1,571 Medicare patients who saw Dr. Karshbaum in 2024, with an average age of 74.
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What services does Dr. Stephen Howard Karshbaum bill to Medicare?
In 2024, Dr. Karshbaum's most billed Medicare services were medical supplies or transport (A9575), diagnostic imaging (70450) and diagnostic imaging (72125).
Where did Dr. Stephen Howard Karshbaum go to medical school?
Dr. Karshbaum graduated from Tufts University School of Medicine in 1991.
How long has Dr. Stephen Howard Karshbaum been practicing?
Dr. Karshbaum graduated from medical school in 1991, 35 years ago.
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