DANIEL CHOYCE CALLAHAN, MD — NPI 1255580593 (Board-Certified Neurologist (Brain, Spine, Stroke & Nerve Specialist) in SULLIVAN, IN)

CMS-1500 Box 24J / 33a • NPI

1255580593

Type 1 Individual Rendering/Ordering

HIPAA NUCC Taxonomy • CMS Code

2084P2900X (CMS 86)

Board-Certified Neurologist (Brain, Spine, Stroke & Nerve Specialist)

Box 32 Service Location & ZIP+4

2120 N SECTION ST, SULLIVAN, IN, 47882-7518

✓ 9-Digit EDI 837 ZIP+4 (47882-7518)

Practice Phone & Referral Fax

(812) 268-2556

Direct NPPES Verification Line

✓ HHS OIG LEIE Sanction Screening — VERIFIED CLEAR: NPI 1255580593 (DANIEL CHOYCE CALLAHAN, MD) has 0 active federal exclusions across all 84,224 HHS OIG LEIE sanction records (Database Verified: 2026-11-11).

CMS Medicare Order & Referring PECOS Eligibility

This practitioner does not currently appear in the CMS individual Order & Referring PECOS file (may practice in pediatrics, commercial-only networks, or hospital-employed settings).

Official CMS NPPES Credential & Practice Profile

10-Digit NPI Number	`1255580593` (NPI-1 Individual Practitioner)
Provider / Legal Name	DANIEL CHOYCE CALLAHAN, MD
Plain-English Specialty	Board-Certified Neurologist (Brain, Spine, Stroke & Nerve Specialist) NUCC Code: `2084P2900X` (Psychiatry & Neurology, Pain Medicine)
Certifying / Licensing Body	American Board of Psychiatry and Neurology (ABPN)
Practice Location Address	2120 N SECTION ST, SULLIVAN, IN, 47882-7518
Practice Telephone / Fax	Tel: (812) 268-2556
Administrative Mailing Address	PO BOX 10, SULLIVAN, IN, 47882-0010
Enumeration & Last Sync	Enumerated: 2008-09-11 \| CMS Record Updated: 2026-01-30

Clinic Location, Accessibility & Directions

📍 Practice Location & Patient Access

2120 N SECTION ST, SULLIVAN, IN, 47882-7518

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Plain-English Taxonomy & CMS Crosswalk (2084P2900X)

What Does Taxonomy Code 2084P2900X Mean?

In the HIPAA National Uniform Claim Committee (NUCC) classification, code 2084P2900X translates to:
"Board-Certified Neurologist (Brain, Spine, Stroke & Nerve Specialist)"

CMS-1500 Medicare Specialty Crosswalk: CMS Code 86 (Physician/Neuropsychiatry)
Certifying / Accrediting Authority: American Board of Psychiatry and Neurology (ABPN)
Clinical Scope: Stroke recovery, chronic or severe migraines, seizures, numbness/tingling in hands or feet (neuropathy), tremors, memory loss, or suspected CSF leak.

Specialty Clinical Procedures & Therapeutic Classes

Standard Scope of Care (DANIEL CHOYCE CALLAHAN, MD)

Typical CPT / Diagnostic Procedures:

Electroencephalography (EEG — CPT 95816) for Seizure & Epilepsy Evaluation
Electromyography (EMG) & Nerve Conduction Studies (NCS)
Lumbar Puncture & Cerebrospinal Fluid (CSF) Pressure/Analysis
Acute Ischemic Stroke NIHSS Assessment & Neuroimaging Review

Common Therapeutic Classes:

CGRP Antagonists & Triptans (Sumatriptan, Rizatriptan) for Migraine
Antiepileptic Drugs (Levetiracetam, Lamotrigine, Valproate)
Levodopa/Carbidopa (Parkinson's Disease) & Gabapentin/Pregabalin (Neuropathy)
Antiplatelet & Secondary Stroke Prevention Regimens

All Registered NUCC Taxonomies & State Licenses

Taxonomy Code & Plain-English Description	State License & Primary Status
`2084P2900X` — Psychiatry & Neurology, Pain Medicine Plain English: Board-Certified Neurologist (Brain, Spine, Stroke & Nerve Specialist)	State: MI \| License: `4301099722` \| Primary: Secondary
`2084P2900X` — Psychiatry & Neurology, Pain Medicine Plain English: Board-Certified Neurologist (Brain, Spine, Stroke & Nerve Specialist)	State: IN \| License: `01080614A` \| Primary: Yes (Primary)
`2084P2900X` — Psychiatry & Neurology, Pain Medicine Plain English: Board-Certified Neurologist (Brain, Spine, Stroke & Nerve Specialist)	State: IL \| License: `036.147496` \| Primary: Secondary

Medical Billing, RCM & Hospital Credentialing Teams:

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DANIEL CHOYCE CALLAHAN, MD (NPI #1255580593)