Bariatric SurgeryGastric BypassLaparoscopy
Dr. David Matthew Parker, MD
NPI1902024854PAC ID3577729185
- Medicare services, 2024
- 96
- Medicare patients, 2024
- 86
- Part D claims, 2024
- 73
- Publications
- 41
- Hospital affiliations
- 3
- Practice address
- 100 North Academy Avenue, Danville, PA 17822
- Practice phone
- Call (570) 271-6211
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. David Matthew Parker is a general surgeon in Danville, Pennsylvania
Dr. Parker practices at Geisinger Medical Center in Danville, Pennsylvania, part of Risant Health.
Dr. Parker's NPI, 1902024854, was assigned on April 23, 2007. Dr. Parker graduated from West Virginia University School of Medicine in 2003. Dr. Parker holds Pennsylvania license MD444921.
NPI and contact details
- NPI
- 1902024854NPI Registry (opens in a new tab)
- Medicare PAC ID
- 3577729185
- NPI enumeration date
- April 23, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (570) 271-6211
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. David Matthew Parker practices at Geisinger Medical Center in Danville, Pennsylvania
Dr. Parker's primary practice is Geisinger Medical Center, at 100 North Academy Avenue, Danville, PA 17822 in Montour County. The practice phone is (570) 271-6211.
- Geisinger Medical Center100 North Academy Avenue, Danville, PA 17822 · Montour CountyPhone(570) 271-6211
Source: Dmand AI Affiliation Data
Dr. David Matthew Parker is affiliated with 3 sites of care and 2 medical groups
Dr. Parker's primary practice is Geisinger Medical Center in Danville, Pennsylvania, part of Risant Health. Dr. Parker is also affiliated with Geisinger Lewistown Hospital. The medical group on file is Geisinger. Dmand AI also links Dr. Parker to 1 more hospital and 1 medical group, each named with a free account.
Geisinger Lewistown HospitalGeisinger1 hospitalName with a free account1 medical groupName with a free account
See all 5 affiliations for Dr. ParkerSources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. David Matthew Parker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Parker practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Geisinger Medical Center | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. David Matthew Parker is one of 1,398 general surgeons in Pennsylvania
Surgery is Dr. Parker's primary specialty in the NPI Registry, under taxonomy code 208600000X. Dr. Parker is licensed in Pennsylvania.
Specialties and state licenses
- Surgery, PennsylvaniaPrimary
General surgeons near Dr. Parker
Counts of general surgeons with a Dmand AI profile, by place and practice. Each opens the list.
1,398general surgeons in Pennsylvania41general surgeons in Danville24general surgeons at Geisinger Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. David Matthew Parker billed Medicare for 96 services in 2024
CMS data shows 96 Medicare services from Dr. Parker across 3 procedure codes in 2024, for 86 Medicare patients. Medicare paid $23,867 for them.
Medicare services, 202496
Medicare patients86
Paid by Medicare$23,867
Procedure codes3
Dr. Parker's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 572024: 6819%
- Surgery
- 2023: 352024: 2820%
Where Dr. Parker's Medicare services took place, 2024
- In an office2122%
- In a facility7578%
Dr. Parker compared with the Pennsylvania median for general surgeons, 2024
- Dr. Parker
- Pennsylvania median
- Medicare services
- 96vs 15839% below
- Medicare patients
- 86vs 12732% below
- Part D claims
- 51vs 2976% above
Medians across 1,213 general surgeons in Pennsylvania with Dmand AI profiles that report each measure.
Dr. Parker'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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Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. David Matthew Parker treated 86 Medicare patients in 2024, average age 71
CMS counts 86 Medicare patients who saw Dr. Parker in 2024. The largest group is 65 to 74, with 43 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 14% are also on Medicaid. Their average risk score is 1.43, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Parker's median patient age at 71, with 75% women.
Medicare patients, 202486
Average age71
Average risk score1.43
Also on Medicaid14%
Dr. Parker's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Parker's Medicare patients by sex, 2024
- Women6171%
- Men2529%
Chronic conditions among Dr. Parker's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis55%
- Anxiety49%
- Mood disorders49%
- Depression45%
- Osteoporosis33%
- Chronic kidney disease29%
Share of Medicare patients with each condition. A patient can have several.
Dr. Parker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 71
Patient panel by sex, all payers
- Women75%
- Men24%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. David Matthew Parker wrote 73 Medicare Part D claims in 2024
In 2024, Dr. Parker wrote 73 Medicare Part D claims for 28 patients. 99% of them were for generic drugs. CMS names the drug for 51 of them, across 2 drugs with 11 or more claims each, at $743 in total drug cost. In 2023, CMS named 11 claims across 1 drug.
Part D claims, 202473
Drugs named by CMS2
Total drug cost$743
Part D patients28
Dr. Parker's Part D claims by kind of drug, 2024
- Generic72 claims99%
- Brand-name and other1 claims1%
Dr. Parker's 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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 112024: 51364%
Drugs named by CMS: 2 in 2024, 1 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
Dr. David Matthew Parker ranks in the 60th percentile for upper gastrointestinal (gi) endoscopy for acid reflux in Medicare
Dr. Parker accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Parker as offering telehealth. CMS counts 40 procedures of upper gastrointestinal (gi) endoscopy for acid reflux by Dr. Parker, more than 60% of the clinicians it reports for that procedure.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Where Dr. Parker ranks in Medicare procedure volume
- Upper gastrointestinal (GI) endoscopy for acid reflux
- 60th percentile40 procedures
CMS ranks each clinician against every clinician it reports for the same procedure category.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. David Matthew Parker has 41 publications on record
Dmand AI links 41 papers to Dr. Parker, published from 2013 to 2025. 2022 was the busiest year, with 8. The most frequent topics are Obesity, Morbid, Gastric Bypass and Laparoscopy. Dr. Parker has published most often in Surg Endosc. Dr. Parker's most frequent co-authors are Anthony T. Petrick, MD, Ryan D. Horsley, DO and Jon D. Gabrielsen, MD.
Papers41
Years published2013 to 2025
Dr. Parker's papers by year, 2016 to 2025
Topics Dr. Parker writes about most
- Obesity, Morbid
- Gastric Bypass
- Laparoscopy
- Bariatric Surgery
- Postoperative Complications
- Gastrectomy
- Diabetes Mellitus, Type 2
- Hernia, Hiatal
Dr. Parker's most frequent co-authors
- Anthony T. Petrick, MD34 shared papers
- Ryan D. Horsley, DO17 shared papers
- Jon D. Gabrielsen, MD16 shared papers
Recent publications by Dr. Parker
Surg Obes Relat Dis
Bariatric SurgeryBody Mass IndexDiabetes Mellitus, Type 2
Abdominal PainGastric BypassGastroesophageal Reflux
See who Dr. Parker researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Parker works with, so you can find a warm path to the right general surgeons.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. David Matthew Parker received $901 in industry payments from 2018 to 2024
CMS Open Payments shows 11 general payments to Dr. Parker from 4 drug and device companies from 2018 to 2024. Travel and lodging make up the largest share, 67% of the total. Intuitive Surgical, Inc. paid the most, $831.
General payments to Dr. Parker by program year, 2018 to 2024
General payments to Dr. Parker by kind, 2018 to 2024
$901in total
- Travel and lodging$60267%
- Food and beverage$29933%
Companies that paid Dr. Parker 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. David Matthew Parker graduated from West Virginia University School of Medicine
Dr. Parker graduated from West Virginia University School of Medicine in 2003.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. David Matthew Parker'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 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) |
| 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. David Matthew Parker
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. David Matthew Parker's NPI number?
Dr. David Matthew Parker's NPI number is 1902024854. It was assigned on April 23, 2007, and it is active in the NPI Registry.
What kind of doctor is Dr. David Matthew Parker?
Dr. David Matthew Parker is a general surgeon in Danville, Pennsylvania. The primary specialty in the NPI Registry is Surgery Physician (taxonomy code 208600000X).
Where does Dr. David Matthew Parker practice?
Dr. Parker practices at 100 North Academy Avenue, Danville, PA 17822. Dr. Parker's primary practice is Geisinger Medical Center in Danville, Pennsylvania, part of Risant Health. Dmand AI also links Dr. Parker to 1 hospital and 1 medical group.
What is Dr. David Matthew Parker's office phone number?
The practice phone on file for Dr. Parker is (570) 271-6211.
What is Dr. David Matthew Parker's medical license number?
Dr. Parker holds Pennsylvania license MD444921.
Which hospitals is Dr. David Matthew Parker affiliated with?
Dr. Parker practices at Geisinger Medical Center in Danville, Pennsylvania. Dr. Parker is also affiliated with Geisinger Lewistown Hospital. Dmand AI links Dr. Parker to 1 more hospital.
What medical group is Dr. David Matthew Parker part of?
Dr. Parker is linked to Geisinger. Dmand AI links Dr. Parker to 1 more medical group.
Does Dr. David Matthew Parker accept Medicare?
Yes. CMS data shows Dr. Parker billed Medicare for 96 services in 2024, and Dr. Parker accepts Medicare assignment.
Does Dr. David Matthew Parker offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Parker as offering telehealth services.
How many Medicare patients does Dr. David Matthew Parker see?
CMS counts 86 Medicare patients who saw Dr. Parker in 2024, with an average age of 71.
Show 7 more questionsShow fewer questions
What services does Dr. David Matthew Parker bill to Medicare?
In 2024, Dr. Parker's most billed Medicare services were office visit, established patient (99215), surgery: digestive system (43281) and surgery: digestive system (43235).
Where did Dr. David Matthew Parker go to medical school?
Dr. Parker graduated from West Virginia University School of Medicine in 2003.
What drugs does Dr. David Matthew Parker prescribe most?
In 2024 Medicare Part D data, Dr. Parker's most prescribed drugs by claims were Omeprazole and Pantoprazole Sodium.
Has Dr. David Matthew Parker received payments from drug or device companies?
CMS Open Payments shows $901 in general payments to Dr. Parker from 4 companies from 2018 to 2024. The largest total came from Intuitive Surgical, Inc.
How long has Dr. David Matthew Parker been practicing?
Dr. Parker graduated from medical school in 2003, 23 years ago.
Does Dr. David Matthew Parker do research?
Dmand AI links 41 publications to Dr. Parker, published from 2013 to 2025.
Who does Dr. David Matthew Parker publish with?
Dr. Parker's most frequent co-authors are Anthony T. Petrick, MD (34 shared papers), Ryan D. Horsley, DO (17 shared papers) and Jon D. Gabrielsen, MD (16 shared papers).
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