Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
John A Fling, MD
Allergy Physician in Fort Worth, TX · enumerated 2006.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1487619995
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Registry record
Entity type Individual (Type 1)
Name John A Fling
Credential MD
Sex Male
Practice address 855 Montgomery St, Fort Worth, TX, 76107
Phone (817) 735-2363
Fax (817) 735-2653
Enumeration date Apr 18, 2006
Last updated in NPPES Jul 5, 2017
Taxonomy & licenses
207K00000X Allergy & Immunology Physician Allopathic & Osteopathic Physicians · License F1545 (TX) Secondary
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 |
|---|---|---|---|
| 114065903 | Other | TX | CSHCN |
| 114065902 | Medicaid | TX | - |
| 847311 | Other | TX | BCBS |
| 114065905 | Medicaid | TX | - |
| 370004852 | Other | TX | RAILROAD MEDICARE PIN |
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.
Frequently asked questions
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
What specialty is John Fling?
John Fling is registered in NPPES with the primary taxonomy of Allergy Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-07-05.