NPPES file of Aug 9, 2026

William Joseph Lago, M.D.

Family Medicine Physician · Louisville, OH

William Joseph Lago, M.D. is a family medicine physician with a practice address in Louisville, Ohio, and NPI 1467439232, issued on Dec 22, 2005. Check the license (Ohio 35066162, as entered in NPPES) on the State Medical Board of Ohio; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1467439232
Name
William Joseph Lago
Credential
M.D.
Primary taxonomy
Family Medicine Physician 207Q00000X
License number
35066162 OH
Self-reported in NPPES; status is on the state search
Practice location
1302 W Main St, Louisville, OH 44641
Phone
(330) 875-5544
Enumerated
Dec 22, 2005
Record last updated
Apr 24, 2012 (not updated in 14 years: call before relying on the address or phone)
Fax
(330) 875-8150
Medicaid ID
0959968 OH
Medicare enrollment
Enrolled (PECOS I20041014000543); accepts Medicare assignment
Medical or professional school
Northeastern Ohio University College Of Medicine, 1991
Telehealth
Offers telehealth (CMS)
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest family medicine physician records → All 5,606 in Ohio → Look up another NPI →

Also registered at 1302 W Main St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Alexa Matsui, APRN CNPAdult Health Nurse Practitioner1477920106
  2. Amy Petrillo, C.N.P.Family Nurse Practitioner1174874846
  3. Brady Steineck, M.D.Family Medicine Physician1164678298
  4. Philip Withnell, MDFamily Medicine Physician1326097288

Verify William Joseph Lago in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersState Medical Board of Ohio
    Search for license 35066162    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Open the Ohio license search

PlainDoctor does not match the HHS-OIG exclusion list to individual records: most entries carry no NPI. Search the OIG exclusion list by name.

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3.7 times the Medicare Part D claims of the average family medicine physician in 2024

13,044 Medicare Part D claims for 951 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 12% of claims. 71 claims were for opioids.

  1. William Lago13,044
  2. Specialty average3,544

Most prescribed

  1. Atorvastatin Calcium755 claims
  2. Levothyroxine Sodium598 claims
  3. Omeprazole588 claims
  4. Lisinopril573 claims
  5. Amlodipine Besylate475 claims
  6. Losartan Potassium361 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.

2 hospitals and group practices

  1. Cleveland ClinicCleveland, OH · Acute Care Hospitals4 of 5 stars
  2. Wooster Clinic LLCWooster, OH

Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through); hospitals matched to CMS Hospital General Information (Care Compare) (data.cms.gov). Star ratings are CMS hospital ratings, not ratings of this provider.

William Joseph Lago among 5,606 family medicine physician records in Ohio

William Joseph Lago, M.D. is one of 5,606 family medicine physician records with a practice address in Ohio. 80% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.

  • NPI issued2005 · 0% of these records are older, 82% newer
  • In a Medicare fileYes · 80% of these records are
  • In the CMS Doctors and Clinicians fileYes · 63% of these records are
  • Graduated1991 · median 2005 among the 3,510 with a school on file
  • Record last updated2012 · 58% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Ohio practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

4 family medicine physician records list a practice address in Louisville

They are 4 of the 180 NPPES records with a practice address in Louisville, and 5,606 family medicine physician records in Ohio.

All 5,606 in Ohio → Every provider in Louisville → Family Medicine Physician nationwide →

The 8 family medicine physician records with the nearest ZIP codes

  1. Jill Parrish, M.D.Louisville, OH 446411306883186
  2. Brady Steineck, M.D.Louisville, OH 446411164678298
  3. Philip Withnell, MDLouisville, OH 446411326097288
  4. Stephen Grossi, MDMalvern, OH 446441447991088
  5. Steven Stasiak, M.D.Malvern, OH 446441336128289
  6. Joni Stasiak, M.D.Malvern, OH 446441245219187
  7. Son Dang, MDMassillon, OH 446461699764944
  8. Jessica Falvo Lang, M.D.Massillon, OH 446461043295892

Common questions

What is William Joseph Lago, M.D.'s NPI number?

William Joseph Lago, M.D.'s National Provider Identifier (NPI) is 1467439232, issued on Dec 22, 2005. An NPI identifies a provider in billing; it is not a license.

Where is William Joseph Lago, M.D. located?

The NPPES record lists a practice address at 1302 W Main St, Louisville, OH, 44641. Phone: (330) 875-5544. Providers update this record themselves, so call before visiting.

How can I verify William Joseph Lago, M.D.'s license?

NPPES lists Ohio license number 35066162, as entered by the provider. Search the State Medical Board of Ohio at https://elicense.ohio.gov/oh_verifylicense. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.

How much does William Joseph Lago, M.D. prescribe under Medicare Part D?

In 2024, William Joseph Lago, M.D. had 13,044 Medicare Part D claims for 951 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

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.