Peter Josiah Knowles, D.C.
Chiropractor · Machias, ME
Peter Josiah Knowles, D.C. is a chiropractor with a practice address in Machias, Maine, and NPI 1992847180, issued on Feb 13, 2007. Check the license (Maine CR581, as entered in NPPES) with the Maine board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Peter Josiah Knowles
- Credential
- D.C.
- Primary taxonomy
- Chiropractor 111N00000X
- License number
- CR581 ME
Self-reported in NPPES; status is on the state search - Practice location
- 19 E Main St, Machias, ME 04654
- Phone
- (207) 255-8001
- Enumerated
- Feb 13, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (207) 255-8001
- Medicaid ID
- 112990099 ME
- Medicare enrollment
- Enrolled (PECOS I20120723000104); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest chiropractor records → All 418 in Maine → Look up another NPI →
Also registered at 19 E Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Ernest Hayes, Dpm, DPMPodiatrist1467547158
Verify Peter Josiah Knowles in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maine board licenses this profession
Search for license CR581Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- St Croix Regional Family Health CenterPrinceton, ME
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Peter Josiah Knowles among 418 chiropractor records in Maine
Peter Josiah Knowles, D.C. is one of 418 chiropractor records with a practice address in Maine. 26% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 39% of them.
- NPI issued2007 · 39% of these records are older, 44% newer
- In a Medicare fileYes · 26% of these records are
- In the CMS Doctors and Clinicians fileYes · 52% of these records are
- Graduated1981 · median 2005 among the 219 with a school on file
- Record last updated2007 · 74% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 111N00000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Chiropractor providers in Maine
There are 418 chiropractor records in Maine.
All 418 in Maine → Every provider in Machias → Chiropractor nationwide →
The 8 chiropractor records with the nearest ZIP codes
- Geoffrey Knowles, D.C.Bass Harbor, ME 046531811091242
- Nicole Galante, DCMilbridge, ME 046581902910219
- Michael Farrell, D.C.Princeton, ME 046681962950733
- Jody Norton, DCStonington, ME 046811023154754
- Christian Emery, D.C.Calais, ME 046191992659155
- Michael Siano, D.C.Whiting, ME 046911346306537
- Michael Aker, DCBlue Hill, ME 046141245376953
- Nicole Colson, DCBlue Hill, ME 046141447097159
Common questions
What is Peter Josiah Knowles, D.C.'s NPI number?
Peter Josiah Knowles, D.C.'s National Provider Identifier (NPI) is 1992847180, issued on Feb 13, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Peter Josiah Knowles, D.C. located?
The NPPES record lists a practice address at 19 E Main St, Machias, ME, 04654. Phone: (207) 255-8001. Providers update this record themselves, so call before visiting.
How can I verify Peter Josiah Knowles, D.C.'s license?
NPPES lists Maine license number CR581, as entered by the provider. Search the Maine board that licenses this profession; the NPPES record confirms identity only.
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.