Dr. Mark Clyde Gebhardt, MD
- Medicare services, 2023
- 29
- Medicare patients, 2024
- 27
- Publications
- 20
- Hospital affiliations
- 1
- Industry payments
- $997
- Practice address
- 300 Longwood Ave, Boston, MA 02115
- Practice phone
- Call (617) 355-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Boston Childrens Hospital
Boston, Massachusetts
Find Dr. Gebhardt'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. Mark Clyde Gebhardt is an orthopedic surgeon in Boston, Massachusetts
Dr. Gebhardt practices at Boston Childrens Hospital in Boston, Massachusetts.
Dr. Gebhardt's NPI, 1689655094, was assigned on November 11, 2005. Dr. Gebhardt graduated from University of Cincinnati College of Medicine in 1975. Dr. Gebhardt holds Massachusetts license 47866.
- NPI
- 1689655094NPI Registry (opens in a new tab)
- NPI enumeration date
- November 11, 2005
- NPI status
- Active
- Practice phone
- (617) 355-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 77
- Medical school graduation
- 1975
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Practice Data
Dr. Mark Clyde Gebhardt practices at Boston Childrens Hospital in Boston, Massachusetts
Dr. Gebhardt's primary practice is Boston Childrens Hospital, at 300 Longwood Ave, Boston, MA 02115 in Suffolk County. The practice phone is (617) 355-6000.
- Boston Childrens Hospital300 Longwood Ave, Boston, MA 02115 · Suffolk CountyPhone(617) 355-6000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Mark Clyde Gebhardt is affiliated with 2 sites of care and 3 medical groups
Dr. Gebhardt's primary practice is Boston Childrens Hospital in Boston, Massachusetts. Dr. Gebhardt 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 Dr. Gebhardt to 2 more medical groups, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark Clyde Gebhardt's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Gebhardt practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Boston Childrens Hospital | Available with a free account |
| +1 more site and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mark Clyde Gebhardt is one of 593 orthopedic surgeons in Massachusetts
Orthopaedic surgery is Dr. Gebhardt's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dr. Gebhardt is licensed in Massachusetts.
Specialties and state licenses
- Orthopaedic surgery, MassachusettsPrimary
Orthopedic surgeons near Dr. Gebhardt
Counts of orthopedic surgeons 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. Mark Clyde Gebhardt billed Medicare for 29 services in 2023
CMS data shows 29 Medicare services from Dr. Gebhardt across 2 procedure codes in 2023, all of them office visits, for 27 Medicare patients. Medicare paid $1,216 for them. Every service was in a facility, such as a hospital, rather than an office.
Dr. Gebhardt's Medicare services by type, 2022 to 2023
- 2022
- 2023
- Office and hospital visits
- 2022: 192023: 2953%
Dr. Gebhardt compared with the Massachusetts median for orthopedic surgeons, 2023
- Dr. Gebhardt
- Massachusetts median
- Medicare services
- 29vs 67296% below
- Medicare patients
- 27vs 30291% below
Medians across 543 orthopedic surgeons in Massachusetts with Dmand AI profiles that report each measure.
Dr. Gebhardt's most billed Medicare procedure codes, 2023
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. Gebhardt and other orthopedic surgeons in Massachusetts.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark Clyde Gebhardt treated 27 Medicare patients in 2024, average age 74
CMS counts 27 Medicare patients who saw Dr. Gebhardt in 2024. The largest group is 65 to 74, with 15 patients. 75% of them have high cholesterol, and 70% have arthritis. Their average risk score is 1.56, 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. Gebhardt's median patient age at 56, with 45% women.
Dr. Gebhardt's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Gebhardt's Medicare patients by sex, 2024
- Women1452%
- Men1348%
Chronic conditions among Dr. Gebhardt's Medicare patients, 2024
- High cholesterol75%
- Arthritis70%
- High blood pressure63%
- Anxiety44%
- Depression41%
- Mood disorders41%
Share of Medicare patients with each condition. A patient can have several.
Dr. Gebhardt's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 56
Patient panel by sex, all payers
- Women45%
- Men55%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
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Dr. Mark Clyde Gebhardt has 20 publications on record
Dmand AI links 20 papers to Dr. Gebhardt, published from 2016 to 2025. 2016 was the busiest year, with 4. The most frequent topics are Bone Neoplasms, Bone Transplantation and Femur. Dr. Gebhardt has published most often in Clin Orthop Relat Res. Dr. Gebhardt's most frequent co-authors are Megan E. Anderson, MD, Terence J. Gioe, MD and Seth Samuel Leopold.
Dr. Gebhardt's papers by year, 2016 to 2025
Topics Dr. Gebhardt writes about most
- Bone Neoplasms
- Bone Transplantation
- Femur
- Limb Salvage
- Osteosarcoma
- Antineoplastic Combined Chemotherapy Protocols
- Ethnicity
- Orthopedics
Dr. Gebhardt's most frequent co-authors
- Megan E. Anderson, MD6 shared papers
- Terence J. Gioe, MD5 shared papers
- Seth Samuel Leopold5 shared papers
Recent publications by Dr. Gebhardt
J Pediatr Orthop B
Clin Orthop Relat Res
See who Dr. Gebhardt researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Gebhardt works with, so you can find a warm path to the right orthopedic surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark Clyde Gebhardt received $997 in industry payments from 2019 to 2021
CMS Open Payments shows 27 general payments to Dr. Gebhardt from 3 drug and device companies from 2019 to 2021. Food and beverage make up the largest share, 93% of the total. Zimmer Biomet Holdings, Inc. paid the most, $942.
General payments to Dr. Gebhardt by program year, 2019 to 2021
General payments to Dr. Gebhardt by kind, 2019 to 2021
- Food and beverage$92993%
- Gifts$485%
- Travel and lodging$202%
Companies that paid Dr. Gebhardt the most, 2019 to 2021
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark Clyde Gebhardt graduated from University of Cincinnati College of Medicine
Dr. Gebhardt graduated from University of Cincinnati College of Medicine in 1975.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark Clyde Gebhardt'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 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) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| 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. Mark Clyde Gebhardt
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. Mark Clyde Gebhardt's NPI number?
Dr. Mark Clyde Gebhardt's NPI number is 1689655094. It was assigned on November 11, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark Clyde Gebhardt?
Dr. Mark Clyde Gebhardt is an orthopedic surgeon in Boston, Massachusetts. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Mark Clyde Gebhardt practice?
Dr. Gebhardt practices at 300 Longwood Ave, Boston, MA 02115. Dr. Gebhardt's primary practice is Boston Childrens Hospital in Boston, Massachusetts. Dmand AI also links Dr. Gebhardt to 2 medical groups.
What is Dr. Mark Clyde Gebhardt's office phone number?
The practice phone on file for Dr. Gebhardt is (617) 355-6000.
What is Dr. Mark Clyde Gebhardt's medical license number?
Dr. Gebhardt holds Massachusetts license 47866.
Which hospitals is Dr. Mark Clyde Gebhardt affiliated with?
Dr. Gebhardt is affiliated with Beth Israel Deaconess Medical Center.
What medical group is Dr. Mark Clyde Gebhardt part of?
Dr. Gebhardt is linked to Harvard Medical Faculty Physicians at Beth Israel Deaconess Medical Center (HMFP). Dmand AI links Dr. Gebhardt to 2 more medical groups.
Does Dr. Mark Clyde Gebhardt accept Medicare?
Yes. CMS data shows Dr. Gebhardt billed Medicare for 29 services in 2023.
How many Medicare patients does Dr. Mark Clyde Gebhardt see?
CMS counts 27 Medicare patients who saw Dr. Gebhardt in 2024, with an average age of 74.
What services does Dr. Mark Clyde Gebhardt bill to Medicare?
In 2023, Dr. Gebhardt's most billed Medicare services were office visit, established patient (99213) and office visit, established patient (99212).
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Where did Dr. Mark Clyde Gebhardt go to medical school?
Dr. Gebhardt graduated from University of Cincinnati College of Medicine in 1975.
Has Dr. Mark Clyde Gebhardt received payments from drug or device companies?
CMS Open Payments shows $997 in general payments to Dr. Gebhardt from 3 companies from 2019 to 2021. The largest total came from Zimmer Biomet Holdings, Inc.
How long has Dr. Mark Clyde Gebhardt been practicing?
Dr. Gebhardt graduated from medical school in 1975, 51 years ago.
Does Dr. Mark Clyde Gebhardt do research?
Dmand AI links 20 publications to Dr. Gebhardt, published from 2016 to 2025.
Who does Dr. Mark Clyde Gebhardt publish with?
Dr. Gebhardt's most frequent co-authors are Megan E. Anderson, MD (6 shared papers), Terence J. Gioe, MD (5 shared papers) and Seth Samuel Leopold (5 shared papers).
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