Mr. Howard Marx, MD
Mr. Howard Marx is a Diagnostic Radiology Physician provider (Radiology) practicing in Pasadena, CA, registered in the NPPES registry with NPI 1356307136 since 2006. The credential MD stands for Doctor of Medicine.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1356307136 |
|---|---|
| Entity type | Individual (Type 1) |
| Name | Mr. Howard Marx |
| Credential | MD |
| Sex | Male |
| Practice address | 2090 WOODLYN AVE., Pasadena, CA, 91104 |
| Phone | 6263987642 |
| Enumeration date | 2006-04-21 |
| Last updated in NPPES | 2018-07-23 |
Taxonomy & licenses
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 207R00000X | Internal Medicine Physician | Secondary | G48962 | CA |
| 2085R0202X | Diagnostic Radiology Physician | Primary | G48962 | CA |
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 |
|---|---|---|---|
| 00G489620 | Medicaid | CA | — |
Copy-ready billing details
Provider: Howard Marx, MD NPI: 1356307136 Taxonomy: 2085R0202X (Diagnostic Radiology Physician) Address: 2090 WOODLYN AVE., Pasadena, CA, 91104
Verify this record
Cross-check NPI 1356307136 against the authoritative CMS record: view Mr. Howard Marx 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
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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2018-07-23.