Dr. Guillermo Marquez, MD
- Part D claims, 2023
- 14
- Hospital affiliations
- 1
- Industry payments
- $8,837
- Medical groups
- 3
- State licenses
- 2
- Practice address
- 801 Ostrum St, Bethlehem, PA 18015
- Practice phone
- Call (610) 954-4000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
St Lukes University Hospital Bethlehem
Bethlehem, Pennsylvania
Find Dr. Marquez'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. Guillermo Marquez is an orthopedic surgeon in Bethlehem, Pennsylvania
Dr. Marquez practices at St Lukes University Hospital Bethlehem in Bethlehem, Pennsylvania.
Dr. Marquez's NPI, 1902467418, was assigned on June 25, 2019. Dr. Marquez holds Kansas license 94-10061.
- NPI
- 1902467418NPI Registry (opens in a new tab)
- Medicare PAC ID
- 7214263979
- NPI enumeration date
- June 25, 2019
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (610) 954-4000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 33
- Medical school graduation
- 2019
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Guillermo Marquez practices at St Lukes University Hospital Bethlehem in Bethlehem, Pennsylvania
Dr. Marquez's primary practice is St Lukes University Hospital Bethlehem, at 801 Ostrum St, Bethlehem, PA 18015 in Northampton County. The practice phone is (610) 954-4000.
- St Lukes University Hospital Bethlehem801 Ostrum St, Bethlehem, PA 18015 · Northampton CountyPhone(610) 954-4000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Guillermo Marquez is affiliated with 5 sites of care and 3 medical groups
Dr. Marquez's primary practice is St Lukes University Hospital Bethlehem in Bethlehem, Pennsylvania. Dr. Marquez is also affiliated with St. Luke's Hospital - Monroe Campus. The medical group on file is St. Luke's South Mountain Family Practice. Dmand AI also links Dr. Marquez to 3 more group practices and clinics and 2 medical groups, 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. Guillermo Marquez's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Marquez practices, 4 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| St Lukes University Hospital Bethlehem | Available with a free account |
| +4 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Guillermo Marquez is one of 994 orthopedic surgeons in Pennsylvania
Orthopaedic surgery is Dr. Marquez's primary specialty in the NPI Registry, under taxonomy code 207X00000X. Dmand AI has Dr. Marquez's licenses on file in 2 states: Kansas and Georgia.
Specialties and state licenses
- Orthopaedic surgery, KansasPrimary
- Georgia license
Orthopedic surgeons near Dr. Marquez
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. Guillermo Marquez's patients have a median age of 13
Across all payers, Dmand AI patient panel data puts Dr. Marquez's median patient age at 13, with 45% women.
Dr. Marquez's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 13
Patient panel by sex, all payers
- Women45%
- Men54%
Source: Dmand AI Patient Panel Data
Dr. Guillermo Marquez wrote 14 Medicare Part D claims in 2023
In 2023, Dr. Marquez wrote 14 Medicare Part D claims. They cover 1 drug, with $183 in total drug cost.
Dr. Marquez's most prescribed drugs by claims, 2023
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Source: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026
How Dr. Guillermo Marquez takes part in Medicare
Dr. Marquez 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. Guillermo Marquez received $8,837 in industry payments from 2019 to 2025
CMS Open Payments shows 62 general payments to Dr. Marquez from 10 drug and device companies from 2019 to 2025. Education make up the largest share, 47% of the total. Titan Surgical Group, LLC paid the most, $2,400.
General payments to Dr. Marquez by program year, 2019 to 2025
General payments to Dr. Marquez by kind, 2019 to 2025
- Education$4,12447%
- Food and beverage$2,70131%
- Travel and lodging$2,01223%
Companies that paid Dr. Marquez the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Guillermo Marquez'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 patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (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 Dr. Guillermo Marquez
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. Guillermo Marquez's NPI number?
Dr. Guillermo Marquez's NPI number is 1902467418. It was assigned on June 25, 2019, and it is active in the NPI Registry.
What kind of doctor is Dr. Guillermo Marquez?
Dr. Guillermo Marquez is an orthopedic surgeon in Bethlehem, Pennsylvania. The primary specialty in the NPI Registry is Orthopaedic Surgery Physician (taxonomy code 207X00000X).
Where does Dr. Guillermo Marquez practice?
Dr. Marquez practices at 801 Ostrum St, Bethlehem, PA 18015. Dr. Marquez's primary practice is St Lukes University Hospital Bethlehem in Bethlehem, Pennsylvania. Dmand AI also links Dr. Marquez to 3 group practices and clinics and 2 medical groups.
What is Dr. Guillermo Marquez's office phone number?
The practice phone on file for Dr. Marquez is (610) 954-4000.
What is Dr. Guillermo Marquez's medical license number?
Dr. Marquez holds Kansas license 94-10061, one of the licenses on file in 2 states.
Which states has Dr. Guillermo Marquez been licensed in?
Dmand AI has state licenses on file for Dr. Marquez in Kansas and Georgia.
Which hospitals is Dr. Guillermo Marquez affiliated with?
Dr. Marquez is affiliated with St. Luke's Hospital - Monroe Campus.
What medical group is Dr. Guillermo Marquez part of?
Dr. Marquez is linked to St. Luke's South Mountain Family Practice. Dmand AI links Dr. Marquez to 2 more medical groups.
Does Dr. Guillermo Marquez accept Medicare?
Yes. CMS lists Dr. Marquez as accepting Medicare assignment.
What drugs does Dr. Guillermo Marquez prescribe most?
In 2023 Medicare Part D data, Dr. Marquez's most prescribed drugs by claims were Hydrocodone-Acetaminophen.
Has Dr. Guillermo Marquez received payments from drug or device companies?
CMS Open Payments shows $8,837 in general payments to Dr. Marquez from 10 companies from 2019 to 2025. The largest total came from Titan Surgical Group, LLC.
How long has Dr. Guillermo Marquez been practicing?
Dr. Marquez graduated from medical school in 2019, 7 years ago.
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