William John Dahms, D.O.
Nephrology Physician · Newark, DE
William John Dahms, D.O. is a nephrology physician with a practice address in Newark, Delaware, and NPI 1952419376, issued on Aug 26, 2006. Check the license (Delaware C2-0008640, as entered in NPPES) on the Delaware Board of Medical Licensure and Discipline; the Medicare figures below come from public CMS files.
- Name
- William John Dahms
- Credential
- D.O.
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- C2-0008640 DE
H0067091 MD
Self-reported in NPPES; status is on the state search - Practice location
- 4923 Ogletown Stanton RD, Newark, DE 19713
- Phone
- (302) 225-0451
- Enumerated
- Aug 26, 2006
- Record last updated
- Jun 17, 2021 (not updated in 5 years: call before relying on the address or phone)
- Fax
- (302) 225-0472
- Medicaid IDs
- 0175501 NJ
1952419376 DE
415810500 MD - Medicare enrollment
- Enrolled (PECOS I20080915000141); accepts Medicare assignment
- Medical or professional school
- Philadelphia College Of Osteopathic Medicine, 2000
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 52 in Delaware → Look up another NPI →
Also registered at 4923 Ogletown Stanton RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Feroz Abubacker Kaniyamparambil, M.DNephrology Physician1710119045
- Silvia Almanza-ShoopNurse's Aide1609316512
- Piyaporn Apivatanagul, MDNephrology Physician1477766707
- Kristine BrooksRegistered Dietitian1265805048
- Valerie BurrisNurse's Aide1215325980
- Catherine ChanceRegistered Nurse1669838231
Verify William John Dahms in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersDelaware Board of Medical Licensure and Discipline
Search for license C2-0008640Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
5% fewer Medicare Part D claims than the average nephrology physician in 2024
1,397 Medicare Part D claims for 243 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 10% of claims.
Most prescribed
- Torsemide248 claims
- Losartan Potassium153 claims
- Allopurinol89 claims
- Amlodipine Besylate61 claims
- Spironolactone56 claims
- Chlorthalidone46 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.
Industry payments in 2024: $1,954.48
84 payments; by number, the most common kind was food and beverage; the largest payer was Mallinckrodt Hospital Products Inc. The 8,230 providers of this specialty with any payment received $3,091.37 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Nephrology Associates PAElkton, MD
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
William John Dahms among 52 nephrology physician records in Delaware
William John Dahms, D.O. is one of 52 nephrology physician records with a practice address in Delaware. 83% 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 29% of them.
- NPI issued2006 · 29% of these records are older, 46% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 75% of these records are
- Graduated2000 · median 2001 among the 39 with a school on file
- Record last updated2021 · 73% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Delaware practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Delaware
There are 52 nephrology physician records in Delaware.
All 52 in Delaware → Every provider in Newark → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Feroz Abubacker Kaniyamparambil, M.DNewark, DE 197131710119045
- Piyaporn Apivatanagul, MDNewark, DE 197131477766707
- Peter Burke, D.O.Newark, DE 197131902126493
- Farhana Chowdhury, MDNewark, DE 197131710218235
- Jeffrey Cicone, MDNewark, DE 197131699773663
- Robert Cox, MDNewark, DE 197131992704639
- Nealanjon Das, DONewark, DE 197131528163649
- Manthodi Faisal, MDNewark, DE 197131245396787
Common questions
What is William John Dahms, D.O.'s NPI number?
William John Dahms, D.O.'s National Provider Identifier (NPI) is 1952419376, issued on Aug 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is William John Dahms, D.O. located?
The NPPES record lists a practice address at 4923 Ogletown Stanton RD, Newark, DE, 19713. Phone: (302) 225-0451. Providers update this record themselves, so call before visiting.
How can I verify William John Dahms, D.O.'s license?
NPPES lists Delaware license number C2-0008640, as entered by the provider. Search the Delaware Board of Medical Licensure and Discipline at https://delpros.delaware.gov/OH_VerifyLicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does William John Dahms, D.O. prescribe under Medicare Part D?
In 2024, William John Dahms, D.O. had 1,397 Medicare Part D claims for 243 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.