Brain NeoplasmsComparative Genomic HybridizationDNA Mutational Analysis
Dr. Parker Halsey Merrill, MD
NPI1811525074PAC ID5698219665
- Medicare services, 2024
- 12
- Medicare patients, 2024
- 71
- Publications
- 9
- Hospital affiliations
- 1
- Medical group
- 1
- Practice address
- 22 Bramhall St, Portland, ME 04102
- Practice phone
- Call (207) 662-0111
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
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Dr. Parker Halsey Merrill is an anesthesiologist in Portland, Maine
Dr. Merrill practices at MaineHealth Maine Medical Center in Portland, Maine, part of MaineHealth.
Dr. Merrill's NPI, 1811525074, was assigned on March 31, 2020. Dr. Merrill graduated from Tufts University School of Medicine in 2020. Dr. Merrill holds Maine license MD28285.
NPI and contact details
- NPI
- 1811525074NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5698219665
- NPI enumeration date
- March 31, 2020
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (207) 662-0111
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 32
- Medical school graduation
- 2020
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Parker Halsey Merrill practices at MaineHealth Maine Medical Center in Portland, Maine
Dr. Merrill's primary practice is MaineHealth Maine Medical Center, at 22 Bramhall St, Portland, ME 04102 in Cumberland County. The practice phone is (207) 662-0111.
- MaineHealth Maine Medical Center22 Bramhall St, Portland, ME 04102 · Cumberland CountyPhone(207) 662-0111
Source: Dmand AI Affiliation Data
Dr. Parker Halsey Merrill is affiliated with 1 site of care and 1 medical group
Dr. Merrill's primary practice is MaineHealth Maine Medical Center in Portland, Maine, part of MaineHealth. The medical group on file is Spectrum Healthcare Partners.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Parker Halsey Merrill's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Merrill practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| MaineHealth Maine Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Parker Halsey Merrill is one of 247 anesthesiologists in Maine
Anesthesiology is Dr. Merrill's primary specialty in the NPI Registry, under taxonomy code 207L00000X. Dr. Merrill is licensed in Maine.
Specialties and state licenses
- Anesthesiology, MainePrimary
Anesthesiologists near Dr. Merrill
Counts of anesthesiologists with a Dmand AI profile, by place and practice. Each opens the list.
247anesthesiologists in Maine105anesthesiologists in Portland80anesthesiologists at MaineHealth Maine Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Parker Halsey Merrill billed Medicare for 12 services in 2024
CMS data shows 12 Medicare services from Dr. Merrill across 1 procedure code in 2024, for 71 Medicare patients. Medicare paid $3,181 for them. Every service was in a facility, such as a hospital, rather than an office.
Medicare services, 202412
Medicare patients71
Paid by Medicare$3,181
Procedure codes1
Dr. Merrill compared with the Maine median for anesthesiologists, 2024
- Dr. Merrill
- Maine median
- Medicare services
- 12vs 7183% below
- Medicare patients
- 71vs 15253% below
Medians across 247 anesthesiologists in Maine with Dmand AI profiles that report each measure.
Dr. Merrill'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. Parker Halsey Merrill treated 71 Medicare patients in 2024, average age 72
CMS counts 71 Medicare patients who saw Dr. Merrill in 2024. The largest group is 65 to 74, with 31 patients. 75% of them have high cholesterol, and 73% have high blood pressure. 21% are also on Medicaid. Their average risk score is 1.38, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Merrill's median patient age at 58, with 56% women.
Medicare patients, 202471
Average age72
Average risk score1.38
Also on Medicaid21%
Dr. Merrill's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Merrill's Medicare patients by sex, 2024
- Women3854%
- Men3346%
Chronic conditions among Dr. Merrill's Medicare patients, 2024
- High cholesterol75%
- High blood pressure73%
- Arthritis61%
- Mood disorders38%
- Depression35%
- Chronic kidney disease32%
- Anxiety31%
- Atrial fibrillation28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Merrill'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
- Women56%
- Men43%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. Parker Halsey Merrill takes part in Medicare
Dr. Merrill 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. Parker Halsey Merrill has 9 publications on record
Dmand AI links 9 papers to Dr. Merrill, published from 2015 to 2019. 2016 was the busiest year, with 3. The most frequent topics are Meningeal Neoplasms, Meningioma and Comparative Genomic Hybridization. Dr. Merrill has published most often in Cancer Genet. Dr. Merrill's most frequent co-authors are Brian Michael Alexander, MD, Priscilla Kaliopi Brastianos, MD and Wenya Linda Bi.
Papers9
Years published2015 to 2019
Dr. Merrill's papers by year, 2015 to 2019
Topics Dr. Merrill writes about most
- Meningeal Neoplasms
- Meningioma
- Comparative Genomic Hybridization
- Biomarkers, Tumor
- Brain Neoplasms
- DNA Mutational Analysis
- Gene Dosage
- High-Throughput Nucleotide Sequencing
Dr. Merrill's most frequent co-authors
- Brian Michael Alexander, MD4 shared papers
- Priscilla Kaliopi Brastianos, MD4 shared papers
- Wenya Linda Bi3 shared papers
Recent publications by Dr. Merrill
Neuro Oncol
Class I Phosphatidylinositol 3-KinasesComparative Genomic HybridizationDNA Mutational Analysis
Cell LineCell SurvivalEpithelial Cells
See who Dr. Merrill researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Merrill 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. Parker Halsey Merrill graduated from Tufts University School of Medicine
Dr. Merrill graduated from Tufts University School of Medicine in 2020.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Parker Halsey Merrill'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 |
| 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. Parker Halsey Merrill
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. Parker Halsey Merrill's NPI number?
Dr. Parker Halsey Merrill's NPI number is 1811525074. It was assigned on March 31, 2020, and it is active in the NPI Registry.
What kind of doctor is Dr. Parker Halsey Merrill?
Dr. Parker Halsey Merrill is an anesthesiologist in Portland, Maine. The primary specialty in the NPI Registry is Anesthesiology Physician (taxonomy code 207L00000X).
Where does Dr. Parker Halsey Merrill practice?
Dr. Merrill practices at 22 Bramhall St, Portland, ME 04102. Dr. Merrill's primary practice is MaineHealth Maine Medical Center in Portland, Maine, part of MaineHealth.
What is Dr. Parker Halsey Merrill's office phone number?
The practice phone on file for Dr. Merrill is (207) 662-0111.
What is Dr. Parker Halsey Merrill's medical license number?
Dr. Merrill holds Maine license MD28285.
Which hospitals is Dr. Parker Halsey Merrill affiliated with?
Dr. Merrill practices at MaineHealth Maine Medical Center in Portland, Maine.
What medical group is Dr. Parker Halsey Merrill part of?
Dr. Merrill is linked to Spectrum Healthcare Partners.
Does Dr. Parker Halsey Merrill accept Medicare?
Yes. CMS data shows Dr. Merrill billed Medicare for 12 services in 2024, and Dr. Merrill accepts Medicare assignment.
How many Medicare patients does Dr. Parker Halsey Merrill see?
CMS counts 71 Medicare patients who saw Dr. Merrill in 2024, with an average age of 72.
What services does Dr. Parker Halsey Merrill bill to Medicare?
In 2024, Dr. Merrill's most billed Medicare services were anesthesia (00670).
Show 4 more questionsShow fewer questions
Where did Dr. Parker Halsey Merrill go to medical school?
Dr. Merrill graduated from Tufts University School of Medicine in 2020.
How long has Dr. Parker Halsey Merrill been practicing?
Dr. Merrill graduated from medical school in 2020, 6 years ago.
Does Dr. Parker Halsey Merrill do research?
Dmand AI links 9 publications to Dr. Merrill, published from 2015 to 2019.
Who does Dr. Parker Halsey Merrill publish with?
Dr. Merrill's most frequent co-authors are Brian Michael Alexander, MD (4 shared papers), Priscilla Kaliopi Brastianos, MD (4 shared papers) and Wenya Linda Bi (3 shared papers).
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