Philip Augustus Deffer, M.D.
Orthopaedic Hand Surgery Physician · Spencer, IA
Philip Augustus Deffer, M.D. is an orthopaedic hand surgery physician with a practice address in Spencer, Iowa, and NPI 1356344261, issued on May 24, 2005. Check the license (Iowa 31115, as entered in NPPES) on the Iowa Board of Medicine; the Medicare figures below come from public CMS files.
- Name
- Philip Augustus Deffer
- Credential
- M.D.
- Primary taxonomy
- Orthopaedic Hand Surgery Physician 207XS0106X
- License number
- 31115 IA
Self-reported in NPPES; status is on the state search - Practice location
- 1200 1St Ave E, Spencer, IA 51301
- Phone
- (712) 262-7511
- Enumerated
- May 24, 2005
- Record last updated
- Aug 2, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (712) 262-3658
- Medicaid ID
- 0142083 IA
- Entity
- Type 1 · individual
8 nearest orthopaedic hand surgery physician records → All 27 in Iowa → Look up another NPI →
Also registered at 1200 1St Ave E
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Philip Augustus Deffer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersIowa Board of Medicine
Search for license 31115Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
The practice group's MIPS final score for 2023 (Medicare payment program): 84.5 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Philip Augustus Deffer among 27 orthopaedic hand surgery physician records in Iowa
Philip Augustus Deffer, M.D. is one of 27 orthopaedic hand surgery 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 78% newer
- In a Medicare fileYes · 85% of these records are
- In the CMS Doctors and Clinicians fileNo · 74% of these records are
- Record last updated2007 · 44% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207XS0106X and a Iowa practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Orthopaedic Hand Surgery Physician providers in Iowa
There are 27 orthopaedic hand surgery physician records in Iowa.
All 27 in Iowa → Every provider in Spencer → Orthopaedic Hand Surgery Physician nationwide →
The 8 orthopaedic hand surgery physician records with the nearest ZIP codes
- Edwin Castaneda, M.D.Dubuque, IA 520021538118948
- Joseph Buckwalter, MDIowa City, IA 522421952693129
- William Blair, M.D.Iowa City, IA 522451699741868
- Curtis Steyers, MDIowa City, IA 522451598757973
- Shane Cook, M.D.Des Moines, IA 503161831483536
- John Heineman, MD, MPHDes Moines, IA 503141629414388
- Thomas Ebinger, M.D.North Liberty, IA 523171326201468
- Ericka Lawler, MDNorth Liberty, IA 523171174540793
Common questions
What is Philip Augustus Deffer, M.D.'s NPI number?
Philip Augustus Deffer, M.D.'s National Provider Identifier (NPI) is 1356344261, issued on May 24, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Philip Augustus Deffer, M.D. located?
The NPPES record lists a practice address at 1200 1St Ave E, Spencer, IA, 51301. Phone: (712) 262-7511. Providers update this record themselves, so call before visiting.
How can I verify Philip Augustus Deffer, M.D.'s license?
NPPES lists Iowa license number 31115, 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.
What is Philip Augustus Deffer, M.D.'s MIPS final score?
The 2023 MIPS final score is 84.5 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.