Karla L. Diffin, PHD
Psychologist · South Paris, ME
Karla L. Diffin, PHD is a psychologist with a practice address in South Paris, Maine, and NPI 1295956480, issued on May 2, 2007. Check the license (Maine PS1355, as entered in NPPES) with the Maine board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Karla L. Diffin
- Credential
- PHD
- Primary taxonomy
- Psychologist 103T00000X
- License number
- PS1355 ME
Self-reported in NPPES; status is on the state search - Practice location
- 3 Walcott St, South Paris, ME 04281
- Phone
- (207) 330-1834
- Enumerated
- May 2, 2007
- Record last updated
- Apr 18, 2019 (not updated in 7 years: call before relying on the address or phone)
- Medicaid ID
- 1295956480 ME
- Medicare enrollment
- Enrolled (PECOS I20130103000242); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest psychologist records → All 260 in Maine → Look up another NPI →
Verify Karla L. Diffin in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Maine board licenses this profession
Search for license PS1355Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Karla L. Diffin among 260 psychologist records in Maine
Karla L. Diffin, PHD is one of 260 psychologist records with a practice address in Maine. 8% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 40% of them.
- NPI issued2007 · 40% of these records are older, 38% newer
- In a Medicare fileNo · 8% of these records are
- In the CMS Doctors and Clinicians fileYes · 23% of these records are
- Graduated2011 · median 1996 among the 59 with a school on file
- Record last updated2019 · 77% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 103T00000X and a Maine practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
1 psychologist record lists a practice address in South Paris
They are 1 of the 32 NPPES records with a practice address in South Paris, and 260 psychologist records in Maine. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 260 in Maine → Every provider in South Paris → Psychologist nationwide →
The 8 psychologist records with the nearest ZIP codes
- Christina Kilgallen, PH.D.New Gloucester, ME 042601629360235
- Thomas ChackoLisbon, ME 042521801757117
- James Cogan, PH.DLewiston, ME 042401386682466
- Annie Derthick, PHDLewiston, ME 042401689039422
- Louis Douglass, PH.D.Lewiston, ME 042401598877979
- Frank EllisLewiston, ME 042401053627133
- Linda Horn, APRNLewiston, ME 042401609889732
- Catherine Leschey, PSYDLewiston, ME 042401619060241
Common questions
What is Karla L. Diffin, PHD's NPI number?
Karla L. Diffin, PHD's National Provider Identifier (NPI) is 1295956480, issued on May 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Karla L. Diffin, PHD located?
The NPPES record lists a practice address at 3 Walcott St, South Paris, ME, 04281. Phone: (207) 330-1834. Providers update this record themselves, so call before visiting.
How can I verify Karla L. Diffin, PHD's license?
NPPES lists Maine license number PS1355, 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. 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.