Kathlyn Diefenderfer, MD
Internal Medicine Physician · Enterprise, AL
Kathlyn Diefenderfer, MD is an internal medicine physician with a practice address in Enterprise, Alabama, and NPI 1780606426, issued on Jul 24, 2006. Check the license (Alabama 00023919, as entered in NPPES) on the Alabama Board of Medical Examiners; the Medicare figures below come from public CMS files.
- Name
- Kathlyn Diefenderfer
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 00023919 AL
Self-reported in NPPES; status is on the state search - Practice location
- 101 Professional LN, Enterprise, AL 36330
- Phone
- (334) 347-3404
- Enumerated
- Jul 24, 2006
- Record last updated
- Nov 9, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (334) 393-0613
- Medicaid ID
- 009957070 AL
- Medicare enrollment
- Enrolled (PECOS I20100201000145); accepts Medicare assignment
- Medical or professional school
- University Of South Alabama College Of Medicine, 1998
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 1,705 in Alabama → Look up another NPI →
Also registered at 101 Professional LN
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Courtney Archie, DOInternal Medicine Physician1487391033
- Chelsea Brincks, FNPFamily Nurse Practitioner1235903170
- Valerie Cobb, NPFamily Nurse Practitioner1720232333
- Brandi Dowling, CRNPFamily Nurse Practitioner1811251010
- Jessica Dunn, MSN, RN, FNP-CFamily Nurse Practitioner1285028928
- Carey Holloway Douglas, NP-CFamily Nurse Practitioner1922430602
Verify Kathlyn Diefenderfer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersAlabama Board of Medical Examiners
Search for license 00023919Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
72% fewer Medicare Part D claims than the average internal medicine physician in 2024
893 Medicare Part D claims for 249 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 54 claims were for opioids.
Most prescribed
- Levofloxacin92 claims
- Furosemide57 claims
- Prednisone37 claims
- Potassium Chloride28 claims
- Cefdinir25 claims
- Clopidogrel24 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.
Bills Medicare through one group practice
- Troy Regional Physicians IncTroy, AL
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Kathlyn Diefenderfer among 1,705 internal medicine physician records in Alabama
Kathlyn Diefenderfer, MD is one of 1,705 internal medicine physician records with a practice address in Alabama. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 9% of them.
- NPI issued2006 · 9% of these records are older, 49% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 67% of these records are
- Graduated1998 · median 2003 among the 1,136 with a school on file
- Record last updated2007 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Alabama practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
11 internal medicine physician records list a practice address in Enterprise
They are 11 of the 460 NPPES records with a practice address in Enterprise, and 1,705 internal medicine physician records in Alabama.
All 1,705 in Alabama → Every provider in Enterprise → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Gary Allen, M.D,Enterprise, AL 363301972596849
- Courtney Archie, DOEnterprise, AL 363301487391033
- Antonio Fontanella Lara, M.D.Enterprise, AL 363301952506362
- William Gammill, DOEnterprise, AL 363301437199908
- Jamie Jones, D.O.Enterprise, AL 363301801020029
- John Kreisberg, MDEnterprise, AL 363301730297441
- William Reynolds, MDEnterprise, AL 363301134178668
- David Rhyne, MDEnterprise, AL 363301285627109
Common questions
What is Kathlyn Diefenderfer, MD's NPI number?
Kathlyn Diefenderfer, MD's National Provider Identifier (NPI) is 1780606426, issued on Jul 24, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Kathlyn Diefenderfer, MD located?
The NPPES record lists a practice address at 101 Professional LN, Enterprise, AL, 36330. Phone: (334) 347-3404. Providers update this record themselves, so call before visiting.
How can I verify Kathlyn Diefenderfer, MD's license?
NPPES lists Alabama license number 00023919, as entered by the provider. Search the Alabama Board of Medical Examiners at https://www.albme.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Kathlyn Diefenderfer, MD prescribe under Medicare Part D?
In 2024, Kathlyn Diefenderfer, MD had 893 Medicare Part D claims for 249 beneficiaries; the average among internal medicine physician prescribers was 3,176. Part D covers Medicare prescriptions 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.