What is Ryan Markus's NPI number?

Ryan Markus's National Provider Identifier (NPI) is 1720402787, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Ryan Markus's specialty?

Ryan Markus is listed in the NPPES registry with a primary specialty of Registered Nurse (Nursing Service Providers).

Where is Ryan Markus located?

Ryan Markus's practice location on file with NPPES is 3000 Crimson Oaks Dr, Fenton, MO 63026-8303.

What is Ryan Markus's phone number?

The practice phone number listed in the NPPES registry for Ryan Markus is (314) 243-1950.

Is Ryan Markus's NPI active?

Yes — Ryan Markus's NPI (1720402787) is active in the NPPES registry as of the last update on 2014-02-11.

IndividualActive

Ryan Markus

NPI 1720402787 · Registered Nurse · Fenton, MO

Ryan Markus is a Registered Nurse provider in Fenton, MO (NPI 1720402787).

Provider details

NPI number: 1720402787
Entity type: Individual
Primary specialty: Registered NurseNursing Service Providers
Sex: Male
Sole proprietor: Yes
License: 2009009448 (MO)

Practice location

3000 Crimson Oaks Dr

Fenton, MO 63026-8303

Phone: (314) 243-1950

Street-level locationGet directions

More MO providers

Mailing address

3000 Crimson Oaks Dr

Fenton, MO 63026-8303

Specialties & taxonomies

Registered NursePrimary163W00000XLicense 2009009448 (MO)
Nursing Service Providers

Profile Score

Detailed profile(77/100 index)

A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.

Registry tenure38% of score
12 yrs in NPPES registry
Profile completeness38% of score
100% of core fields populated
Practice footprint23% of score
1 documented practice location

Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.

Enumerated: 2014-02-11
Last updated: 2014-02-11

Frequently asked questions

What is Ryan Markus's NPI number?: Ryan Markus's National Provider Identifier (NPI) is 1720402787, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Ryan Markus's specialty?: Ryan Markus is listed in the NPPES registry with a primary specialty of Registered Nurse (Nursing Service Providers).
Where is Ryan Markus located?: Ryan Markus's practice location on file with NPPES is 3000 Crimson Oaks Dr, Fenton, MO 63026-8303.
What is Ryan Markus's phone number?: The practice phone number listed in the NPPES registry for Ryan Markus is (314) 243-1950.
Is Ryan Markus's NPI active?: Yes — Ryan Markus's NPI (1720402787) is active in the NPPES registry as of the last update on 2014-02-11.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

Registry dates

Frequently asked questions

Specialties & taxonomies

Profile Score

Frequently asked questions