Walter Lamar Seifert, M.D.
Internal Medicine Physician · Altamonte Springs, FL
Walter Lamar Seifert, M.D. is an internal medicine physician with a practice address in Altamonte Springs, Florida, and NPI 1003835729, issued on Jul 19, 2006. Check the license (Florida ME108299, as entered in NPPES) on the Florida health license search; the Medicare figures below come from public CMS files.
- Name
- Walter Lamar Seifert
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- ME108299 FL
Self-reported in NPPES; status is on the state search - Practice location
- 258 E Altamonte Dr Ste 1000, Altamonte Springs, FL 32701
- Phone
- (407) 212-5589
- Enumerated
- Jul 19, 2006
- Record last updated
- Nov 3, 2021 (not updated in 5 years: call before relying on the address or phone)
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 10,151 in Florida → Look up another NPI →
Verify Walter Lamar Seifert in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersFlorida health license search
Search for license ME108299Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
77% fewer Medicare Part D claims than the average internal medicine physician in 2024
725 Medicare Part D claims for 36 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. 227 claims were for opioids.
Most prescribed
- Oxycodone Hcl152 claims
- Celecoxib79 claims
- Cyclobenzaprine Hcl74 claims
- Morphine Sulfate Er48 claims
- Tizanidine Hcl36 claims
- Losartan-Hydrochlorothiazide30 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.
Walter Lamar Seifert among 10,151 internal medicine physician records in Florida
Walter Lamar Seifert, M.D. is one of 10,151 internal medicine physician records with a practice address in Florida. 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 10% of them.
- NPI issued2006 · 10% of these records are older, 55% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileNo · 65% of these records are
- Record last updated2021 · 48% 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 Florida practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
26 internal medicine physician records list a practice address in Altamonte Springs
They are 26 of the 1,849 NPPES records with a practice address in Altamonte Springs, and 10,151 internal medicine physician records in Florida.
All 10,151 in Florida → Every provider in Altamonte Springs → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Kai Chen, MDAltamonte Springs, FL 327011225561855
- Pedro Gonzalez-Morales, MDAltamonte Springs, FL 327011861682270
- Yuchen Jiang, MDAltamonte Springs, FL 327011417560897
- Vajih KhanAltamonte Springs, FL 327011184663817
- Jianyu Li, MDAltamonte Springs, FL 327011508157983
- Enrique Lozano Ayala, MDAltamonte Springs, FL 327011134413289
- Quan Nguyen, D.O.Altamonte Springs, FL 327011922069533
- Sonia Ramirez-Seifert, M.D.Altamonte Springs, FL 327011568485373
Common questions
What is Walter Lamar Seifert, M.D.'s NPI number?
Walter Lamar Seifert, M.D.'s National Provider Identifier (NPI) is 1003835729, issued on Jul 19, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Walter Lamar Seifert, M.D. located?
The NPPES record lists a practice address at 258 E Altamonte Dr Ste 1000, Altamonte Springs, FL, 32701. Phone: (407) 212-5589. Providers update this record themselves, so call before visiting.
How can I verify Walter Lamar Seifert, M.D.'s license?
NPPES lists Florida license number ME108299, as entered by the provider. Search the Florida health license search at https://mqa-internet.doh.state.fl.us/mqasearchservices/healthcareproviders. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Walter Lamar Seifert, M.D. prescribe under Medicare Part D?
In 2024, Walter Lamar Seifert, M.D. had 725 Medicare Part D claims for 36 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.