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Dr. Mark D. Hershey, MD
NPI1396776878PAC ID2567401961
- Medicare services, 2024
- 102
- Medicare patients, 2024
- 195
- Publications
- 1
- Hospital affiliations
- 2
- Industry payments
- $118
- Practice address
- 123 Medical Center Drive, Brunswick, ME 04011
- Practice phone
- Call (207) 729-0181
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Hershey'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 D. Hershey is an anesthesiologist in Brunswick, Maine
Dr. Hershey practices at MaineHealth Mid Coast Hospital in Brunswick, Maine, part of MaineHealth.
Dr. Hershey's NPI, 1396776878, was assigned on July 5, 2006. Dr. Hershey graduated from Columbia University College of Physicians and Surgeons in 1985. Dr. Hershey holds Massachusetts license 78943.
NPI and contact details
- NPI
- 1396776878NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2567401961
- NPI enumeration date
- July 5, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (207) 729-0181
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 67
- Medical school graduation
- 1985
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mark D. Hershey practices at MaineHealth Mid Coast Hospital in Brunswick, Maine
Dr. Hershey's primary practice is MaineHealth Mid Coast Hospital, at 123 Medical Center Drive, Brunswick, ME 04011 in Cumberland County. The practice phone is (207) 729-0181.
- MaineHealth Mid Coast Hospital123 Medical Center Drive, Brunswick, ME 04011 · Cumberland CountyPhone(207) 729-0181
Source: Dmand AI Affiliation Data
Dr. Mark D. Hershey is affiliated with 3 sites of care and 3 medical groups
Dr. Hershey's primary practice is MaineHealth Mid Coast Hospital in Brunswick, Maine, part of MaineHealth. Dr. Hershey is also affiliated with Newton-Wellesley Hospital. The medical group on file is Spectrum Healthcare Partners. Dmand AI also links Dr. Hershey to 2 more medical groups and 1 clinical lab, each named with a free account.
Newton-Wellesley HospitalSpectrum Healthcare Partners2 medical groupsNames with a free account1 clinical labName with a free account
See all 6 affiliations for Dr. HersheySources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mark D. Hershey's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Hershey practices, 3 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MaineHealth Mid Coast Hospital | Available with a free account |
| +2 more sites and 2 medical groups | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Mark D. Hershey is one of 247 anesthesiologists in Maine
Anesthesiology is Dr. Hershey's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Hershey is licensed in Massachusetts.
Specialties and state licenses
- Anesthesiology, MassachusettsPrimary
Anesthesiologists near Dr. Hershey
Counts of anesthesiologists with a Dmand AI profile, by place and practice. Each opens the list.
247anesthesiologists in Maine12anesthesiologists in Brunswick10anesthesiologists at MaineHealth Mid Coast Hospital
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mark D. Hershey billed Medicare for 102 services in 2024
CMS data shows 102 Medicare services from Dr. Hershey across 7 procedure codes in 2024, for 195 Medicare patients. Medicare paid $13,022 for them.
Medicare services, 2024102
Medicare patients195
Paid by Medicare$13,022
Procedure codes7
Dr. Hershey's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Anesthesia
- 2023: 672024: 8527%
- Surgery
- 2023: 262024: 1735%
Where Dr. Hershey's Medicare services took place, 2024
- In an office1313%
- In a facility8987%
Dr. Hershey compared with the Maine median for anesthesiologists, 2024
- Dr. Hershey
- Maine median
- Medicare services
- 102vs 7144% above
- Medicare patients
- 195vs 15228% above
Medians across 247 anesthesiologists in Maine with Dmand AI profiles that report each measure.
Dr. Hershey'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.
Need commercial claims for Dr. Hershey?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Hershey and other anesthesiologists in Maine.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mark D. Hershey treated 195 Medicare patients in 2024, average age 75
CMS counts 195 Medicare patients who saw Dr. Hershey in 2024. The largest group is 75 to 84, with 89 patients. 75% of them have high cholesterol, and 73% have high blood pressure. 6% are also on Medicaid. Their average risk score is 1.13, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Hershey's median patient age at 61, with 56% women.
Medicare patients, 2024195
Average age75
Average risk score1.13
Also on Medicaid6%
Dr. Hershey's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Hershey's Medicare patients by sex, 2024
- Women11861%
- Men7739%
Chronic conditions among Dr. Hershey's Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- Arthritis70%
- Anxiety39%
- Mood disorders35%
- Depression32%
- Ischemic heart disease28%
- Cancer27%
Share of Medicare patients with each condition. A patient can have several.
Dr. Hershey's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women56%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Mark D. Hershey takes part in Medicare
Dr. Hershey 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. Mark D. Hershey has 1 publication on record
Dmand AI links 1 paper to Dr. Hershey. Dr. Hershey's most frequent co-authors are Katherine M. Berg, MD, Michael N. Cocchi, MD and Michael William Donnino, MD.
Papers1
Dr. Hershey's most frequent co-authors
- Katherine M. Berg, MD1 shared paper
- Michael N. Cocchi, MD1 shared paper
- Michael William Donnino, MD1 shared paper
Recent publications by Dr. Hershey
See who Dr. Hershey researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Hershey works with, so you can find a warm path to the right anesthesiologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Mark D. Hershey received $118 in industry payments from 2019 to 2025
CMS Open Payments shows 4 general payments to Dr. Hershey from 3 drug and device companies from 2019 to 2025. Food and beverage make up the largest share, 100% of the total. Baxter Healthcare paid the most, $64.
General payments to Dr. Hershey by program year, 2019 to 2025
Companies that paid Dr. Hershey the most, 2019 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Mark D. Hershey graduated from Columbia University College of Physicians and Surgeons
Dr. Hershey graduated from Columbia University College of Physicians and Surgeons in 1985.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mark D. Hershey'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) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (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 D. Hershey
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 D. Hershey's NPI number?
Dr. Mark D. Hershey's NPI number is 1396776878. It was assigned on July 5, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Mark D. Hershey?
Dr. Mark D. Hershey is an anesthesiologist in Brunswick, Maine. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Mark D. Hershey practice?
Dr. Hershey practices at 123 Medical Center Drive, Brunswick, ME 04011. Dr. Hershey's primary practice is MaineHealth Mid Coast Hospital in Brunswick, Maine, part of MaineHealth. Dmand AI also links Dr. Hershey to 2 medical groups and 1 clinical lab.
What is Dr. Mark D. Hershey's office phone number?
The practice phone on file for Dr. Hershey is (207) 729-0181.
What is Dr. Mark D. Hershey's medical license number?
Dr. Hershey holds Massachusetts license 78943.
Which hospitals is Dr. Mark D. Hershey affiliated with?
Dr. Hershey practices at MaineHealth Mid Coast Hospital in Brunswick, Maine. Dr. Hershey is also affiliated with Newton-Wellesley Hospital.
What medical group is Dr. Mark D. Hershey part of?
Dr. Hershey is linked to Spectrum Healthcare Partners. Dmand AI links Dr. Hershey to 2 more medical groups.
Does Dr. Mark D. Hershey accept Medicare?
Yes. CMS data shows Dr. Hershey billed Medicare for 102 services in 2024, and Dr. Hershey accepts Medicare assignment.
How many Medicare patients does Dr. Mark D. Hershey see?
CMS counts 195 Medicare patients who saw Dr. Hershey in 2024, with an average age of 75.
What services does Dr. Mark D. Hershey bill to Medicare?
In 2024, Dr. Hershey's most billed Medicare services were anesthesia (01402), surgery: brain, spine and nerves (64447) and anesthesia (00811).
Show 5 more questionsShow fewer questions
Where did Dr. Mark D. Hershey go to medical school?
Dr. Hershey graduated from Columbia University College of Physicians and Surgeons in 1985.
Has Dr. Mark D. Hershey received payments from drug or device companies?
CMS Open Payments shows $118 in general payments to Dr. Hershey from 3 companies from 2019 to 2025. The largest total came from Baxter Healthcare.
How long has Dr. Mark D. Hershey been practicing?
Dr. Hershey graduated from medical school in 1985, 41 years ago.
Does Dr. Mark D. Hershey do research?
Dmand AI links 1 publication to Dr. Hershey.
Who does Dr. Mark D. Hershey publish with?
Dr. Hershey's most frequent co-authors are Katherine M. Berg, MD (1 shared paper), Michael N. Cocchi, MD (1 shared paper) and Michael William Donnino, MD (1 shared paper).
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