Dr. Timothy A. Deffer, MD
Dr. Timothy A. Deffer is a Dermatology Physician provider (Dermatology) practicing in Springfield, MO, registered in the NPPES registry with NPI 1851478283 since 2006. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1851478283 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Dr. Timothy A. Deffer |
| Credential | MD |
| Sex | Male |
| Practice address | 3231 S NATIONAL AVE, Springfield, MO, 65807 |
| Phone | 4178850803 |
| Fax | 4178410110 |
| Enumeration date | 2006-11-01 |
| Last updated in NPPES | 2013-05-03 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207N00000X | Dermatology Physician | Primary | 2001013325 | MO |
MD — Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential
Other identifiers
| Identifier | Type | State | Issuer |
|---|---|---|---|
| 205332109 | Medicaid | MO | — |
| 145785001 | Medicaid | AR | — |
Copy-ready billing details
Provider: Timothy Deffer, MD NPI: 1851478283 Taxonomy: 207N00000X (Dermatology Physician) Address: 3231 S NATIONAL AVE, Springfield, MO, 65807
Other providers at this practice address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1811999386 | Geoffery Stanczyk | Individual | Obstetrics & Gynecology Physician | Springfield, MO |
| 1295711620 | Silvia Huebner | Individual | Allergy Physician | Springfield, MO |
| 1477500213 | Mercy Hospital Springfield | Organization | Pharmacist | Springfield, MO |
| 1447288212 | Mercy Hospital Springfield | Organization | Pharmacist | Springfield, MO |
| 1609899566 | Sarah Bowman | Individual | Registered Dietitian | Springfield, MO |
| 1902814296 | George Pettey | Individual | Family Medicine Physician | Springfield, MO |
| 1679586739 | Sheila George | Individual | Diabetes Educator Registered Nurse | Springfield, MO |
| 1285647370 | Laura Kaufman | Individual | Registered Dietitian | Springfield, MO |
Verify this record
Cross-check NPI 1851478283 against the authoritative CMS record: view Dr. Timothy A. Deffer on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
Is NPI 1851478283 active?
How do I verify Timothy Deffer's NPI record?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2013-05-03.