Haley Estabrook Acker, PA-C
Physician Assistant · Portland, ME
Haley Estabrook Acker, PA-C is a physician assistant with a practice address in Portland, Maine, and NPI 1972167377, issued on May 1, 2019. Check the license (Maine PA2108, as entered in NPPES) with the Maine board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Haley Estabrook Acker
- Credential
- PA-C
- Primary taxonomy
- Physician Assistant 363A00000X
- License numbers
- PA2108 ME
3553 NH
Self-reported in NPPES; status is on the state search - Practice location
- 22 Bramhall St, Portland, ME 04102
- Phone
- (207) 662-2273
- Enumerated
- May 1, 2019
- Record last updated
- Jun 25, 2026
- Fax
- (207) 662-6324
- Medicare enrollment
- Enrolled (PECOS I20260120000547); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest physician assistant records → All 979 in Maine → Look up another NPI →
Also registered at 22 Bramhall St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Haley Estabrook Acker in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maine board licenses this profession
Search for license PA2108Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average physician assistant in 2024
161 Medicare Part D claims for 125 beneficiaries, against an average of 830 among the 101,058 providers of this specialty who prescribed in Part D. 12 claims were for opioids.
Most prescribed
- Amoxicillin-Clavulanate Potass20 claims
- Azithromycin14 claims
- Prednisone13 claims
- Oxycodone Hcl12 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
The MIPS final score for 2023 (Medicare payment program): 98.1 of 100
The Merit-based Incentive Payment System score is reported for this clinician. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023; category weights for 2023 (qpp.cms.gov).
Bills Medicare through 2 group practices
- MainehealthPortland, ME
- Mainehealth New Hampshire Ambulatory CareNorth Conway, NH
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Haley Estabrook Acker among 979 physician assistant records in Maine
Haley Estabrook Acker, PA-C is one of 979 physician assistant records with a practice address in Maine. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2019, is newer than 64% of them.
- NPI issued2019 · 64% of these records are older, 30% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 66% of these records are
- Graduated2020 · median 2017 among the 648 with a school on file
- Record last updated2026 · 47% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363A00000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
243 physician assistant records list a practice address in Portland
They are 243 of the 6,022 NPPES records with a practice address in Portland, and 979 physician assistant records in Maine.
All 979 in Maine → Every provider in Portland → Physician Assistant nationwide →
The 8 physician assistant records with the nearest ZIP codes
- Amy Barraclough, PA-CPortland, ME 041021770533713
- Anne Barter, PA-CPortland, ME 041021245280981
- Meredith Beauregard, PAPortland, ME 041021013967918
- Steven Blessington, PA, MHPPortland, ME 041021841259900
- Blue Butterfield, PAPortland, ME 041021487601878
- Robert Klotz, PAPortland, ME 041021467447847
- Tina Merrill, PA-CPortland, ME 041021639127699
- Pierre Morneault, PA-CPortland, ME 041021326098468
Common questions
What is Haley Estabrook Acker, PA-C's NPI number?
Haley Estabrook Acker, PA-C's National Provider Identifier (NPI) is 1972167377, issued on May 1, 2019. An NPI identifies a provider in billing; it is not a license.
Where is Haley Estabrook Acker, PA-C located?
The NPPES record lists a practice address at 22 Bramhall St, Portland, ME, 04102. Phone: (207) 662-2273. Providers update this record themselves, so call before visiting.
How can I verify Haley Estabrook Acker, PA-C's license?
NPPES lists Maine license number PA2108, as entered by the provider. Search the Maine board that licenses this profession; the NPPES record confirms identity only.
How much does Haley Estabrook Acker, PA-C prescribe under Medicare Part D?
In 2024, Haley Estabrook Acker, PA-C had 161 Medicare Part D claims for 125 beneficiaries; the average among physician assistant prescribers was 830. Part D covers Medicare prescriptions only.
What is Haley Estabrook Acker, PA-C's MIPS final score?
The 2023 MIPS final score is 98.1 of 100. The average among 454,083 clinicians with a measured score was 83.5.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.