JOHN ASHTON ARMSTRONG, DO — NPI 1427679232 (Board-Certified Internist (Adult Diagnostic & Chronic Disease Physician) in ROLLA, MO)

CMS-1500 Box 24J / 33a • NPI

1427679232

Type 1 Individual Rendering/Ordering

HIPAA NUCC Taxonomy • CMS Code

207R00000X (CMS 11)

Board-Certified Internist (Adult Diagnostic & Chronic Disease Physician)

Box 32 Service Location & ZIP+4

1050 W 10TH ST, ROLLA, MO, 65401-2905

✓ 9-Digit EDI 837 ZIP+4 (65401-2905)

Practice Phone & Referral Fax

(573) 364-9000

Direct NPPES Verification Line

✓ HHS OIG LEIE Sanction Screening — VERIFIED CLEAR: NPI 1427679232 (JOHN ASHTON ARMSTRONG, DO) 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	`1427679232` (NPI-1 Individual Practitioner)
Provider / Legal Name	JOHN ASHTON ARMSTRONG, DO
Plain-English Specialty	Board-Certified Internist (Adult Diagnostic & Chronic Disease Physician) NUCC Code: `207R00000X` (Internal Medicine)
Certifying / Licensing Body	American Board of Internal Medicine (ABIM)
Practice Location Address	1050 W 10TH ST, ROLLA, MO, 65401-2905
Practice Telephone / Fax	Tel: (573) 364-9000
Administrative Mailing Address	1050 W 10TH ST, ROLLA, MO, 65401-2905
Enumeration & Last Sync	Enumerated: 2020-05-03 \| CMS Record Updated: 2024-02-27

Clinic Location, Accessibility & Directions

📍 Practice Location & Patient Access

1050 W 10TH ST, ROLLA, MO, 65401-2905

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Plain-English Taxonomy & CMS Crosswalk (207R00000X)

What Does Taxonomy Code 207R00000X Mean?

In the HIPAA National Uniform Claim Committee (NUCC) classification, code 207R00000X translates to:
"Board-Certified Internist (Adult Diagnostic & Chronic Disease Physician)"

CMS-1500 Medicare Specialty Crosswalk: CMS Code 11 (Physician/Internal Medicine)
Certifying / Accrediting Authority: American Board of Internal Medicine (ABIM)
Clinical Scope: Managing multiple adult chronic conditions (diabetes, high blood pressure, high cholesterol, thyroid disorders) or investigating unexplained adult symptoms.

Specialty Clinical Procedures & Therapeutic Classes

Standard Scope of Care (JOHN ASHTON ARMSTRONG, DO)

Typical CPT / Diagnostic Procedures:

Complex Multi-System Adult Diagnostic Workup (CPT 99204–99215)
Preoperative Medical Risk Assessment & Cardiac Clearance
Chronic Kidney, Hepatic & Metabolic Panel Interpretation
Adult Inpatient Hospitalist Management & Discharge Coordination

Common Therapeutic Classes:

Antihypertensives (ACE Inhibitors, ARBs, Calcium Channel Blockers, Thiazides)
Oral Antidiabetic Agents, Basal/Bolus Insulins & Lipid-Lowering Statins
Direct Oral Anticoagulants (Apixaban, Rivaroxaban) & Antiplatelets
Levothyroxine (Hypothyroidism) & Proton Pump Inhibitors (Pantoprazole)

All Registered NUCC Taxonomies & State Licenses

Taxonomy Code & Plain-English Description	State License & Primary Status
`207R00000X` — Internal Medicine Plain English: Board-Certified Internist (Adult Diagnostic & Chronic Disease Physician)	State: MO \| License: `2023028809` \| Primary: Yes (Primary)
`390200000X` — Student in an Organized Health Care Education/Training Program Plain English: Licensed & Credentialed Student in an Organized Health Care Education/Training Program	State: N/A \| License: `Verified` \| Primary: Secondary

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JOHN ASHTON ARMSTRONG, DO (NPI #1427679232)