Geraldine Ryan, M.D

ActiveIndividual ProviderInternal Medicine
NPI issued: February 28, 2006

Quick Facts

NPI Number
1689640609
TypeIndividual
StatusActive
SpecialtyInternal Medicine
Taxonomy207R00000X — Internal Medicine
Phone
(636) 561-5999
StateMO

NPI Validation Status: Verified

✅Valid 10-digit NPI number (1689640609)
✅Active status confirmed
✅Verified by CMS NPPES Registry
✅HIPAA compliant identifier
✅Enumeration date on file (February 28, 2006)
Data source: CMS NPPES

Provider Overview

GERALDINE RYAN, M.D is a Internal Medicine provider based in O Fallon, MO who has been registered with CMS since 2006. This NPI is currently Active under CMS NPPES registry.

Provider Details

NPI Number1689640609
Provider TypeIndividual Provider
GenderFemale
CredentialM.D
StatusActive
Enumeration DateFebruary 28, 2006

Practice Location

CityO Fallon
StateMO
ZIP Code63368-4781
Phone(636) 561-5999

Specialties & Licenses

★ Primary
SpecialtyInternal Medicine
Taxonomy Code207R00000X
License StateMO

Mailing Address

CityO Fallon
StateMO
ZIP Code63368-4781
Phone(636) 561-5999
Same as practice location

How to Use This NPI

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For Insurance Billing

Use NPI 1689640609 in Box 33 of the CMS-1500 claim form. This number is required by all major insurance carriers to identify the billing provider and process electronic medical claims.

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For Credentialing

Reference NPI 1689640609for provider credential verification. Hospital systems, state licensing boards, and CAQH directories query this number to verify the provider's active clinical status.

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For Patients

Share NPI 1689640609 with your insurance company. If you need to verify out-of-network benefits or file a reimbursement claim, your insurance provider will require this number to process it.

About Internal Medicine

Internal Medicine physicians (internists) specialize in the prevention, diagnosis, and nonsurgical treatment of adult illnesses, managing complex chronic conditions and multi-system diseases.

Browse all Internal Medicineproviders →
📊
213,549
Internal Medicine Providers in the US

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People Also Ask

What is Geraldine Ryan's NPI number?
Geraldine Ryan's NPI number is 1689640609, a unique 10-digit identifier issued by the Centers for Medicare & Medicaid Services (CMS).
Is Geraldine Ryan's NPI currently active?
Yes, Geraldine Ryan's NPI status is Active as of the latest CMS NPPES database updates.
What does Geraldine Ryan specialize in?
Geraldine Ryan specializes in Internal Medicine. The healthcare taxonomy code associated with this specialty is 207R00000X.
Where does Geraldine Ryan practice?
Geraldine Ryan practices in O Fallon, MO 63368-4781.
When was Geraldine Ryan's NPI issued?
Geraldine Ryan's NPI was issued on February 28, 2006.
What is Geraldine Ryan's provider type?
Geraldine Ryan is registered as an Individual Provider under CMS NPI Type 1.