Douglas T. Summerfield, MD
Critical Care Medicine (Internal Medicine) Physician · Mason City, IA
Douglas T. Summerfield, MD is a critical care medicine (internal medicine) physician with a practice address in Mason City, Iowa, and NPI 1518120633, issued on Jul 9, 2008. Check the license (Iowa 41014, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Douglas T. Summerfield
- Credential
- MD
- Primary taxonomy
- Critical Care Medicine (Internal Medicine) Physician 207RC0200X
- License numbers
- 41014 IA
105450 MN
54611 MN
0101246408 VA
Self-reported in NPPES; status is on the state search - Practice location
- 1000 4TH St SW, Mason City, IA 50401
- Phone
- (641) 428-6999
- Enumerated
- Jul 9, 2008
- Record last updated
- May 30, 2023
- Fax
- (641) 428-6678
- Medicaid IDs
- 5915367 NC
1518120633 VA - Medicare enrollment
- Enrolled (PECOS I20130913000742); accepts Medicare assignment
- Medical or professional school
- Creighton University School Of Medicine, 2007
- Entity
- Type 1 · individual
8 nearest critical care medicine (internal medicine) physician records → All 27 in Iowa → Look up another NPI →
Also registered at 1000 4TH St SW
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mohamed Abdi, MDRadiation Oncology Physician1982162608
- Luna Acharya, MDHospitalist Physician1609224674
- Jenna AdamsMental Health Counselor1407790710
- Sheela Ahari, MDAnesthesiology Physician1518910462
- Tauseef Akhtar, MDCardiovascular Disease Physician1508218009
- Emad Alamouti-Fard, MDFamily Medicine Physician1811821499
Verify Douglas T. Summerfield in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 41014Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Bills Medicare through one group practice
- North Iowa Mercy ClinicsMason City, IA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Douglas T. Summerfield among 27 critical care medicine (internal medicine) physician records in Iowa
Douglas T. Summerfield, MD is one of 27 critical care medicine (internal medicine) physician records with a practice address in Iowa. 85% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2008, is newer than 44% of them.
- NPI issued2008 · 44% of these records are older, 52% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileYes · 78% of these records are
- Graduated2007 · median 2007 among the 21 with a school on file
- Record last updated2023 · 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 207RC0200X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Critical Care Medicine (Internal Medicine) Physician providers in Iowa
There are 27 critical care medicine (internal medicine) physician records in Iowa.
All 27 in Iowa → Every provider in Mason City → Critical Care Medicine (Internal Medicine) Physician nationwide →
The 8 critical care medicine (internal medicine) physician records with the nearest ZIP codes
- Steven Berry, MDDes Moines, IA 503251225014228
- Gregory Peterson, D.O.Des Moines, IA 503151447255245
- Iaswarya Ganapathiraju, DODes Moines, IA 503091275027963
- Madyson Hoffman, AGACNP-BC, APRNDes Moines, IA 503091629954276
- James Wilson, M.D.Fort Dodge, IA 505011114389285
- Tamarisa Narayan, M.D.West Des Moines, IA 502651851396709
- Swaroopa Rani Nalamalapu, MDWaterloo, IA 507031770947517
- Aniket Mittal, MDCoralville, IA 522411427554351
Common questions
What is Douglas T. Summerfield, MD's NPI number?
Douglas T. Summerfield, MD's National Provider Identifier (NPI) is 1518120633, issued on Jul 9, 2008. An NPI identifies a provider in billing; it is not a license.
Where is Douglas T. Summerfield, MD located?
The NPPES record lists a practice address at 1000 4TH St SW, Mason City, IA, 50401. Phone: (641) 428-6999. Providers update this record themselves, so call before visiting.
How can I verify Douglas T. Summerfield, MD's license?
NPPES lists Iowa license number 41014, as entered by the provider. Search the Iowa Board of Medicine at https://dial.iowa.gov/about-dial/boards-and-commissions/medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
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.