DR. CRYSTAL NNENNE AZU MD
NPI 1114457769
Internal Medicine - Cardiovascular Disease in Saint Louis, MO
About Dr. Crystal Nnenne Azu Md NPPES
Official registry information on file with the National Plan and Provider Enumeration System.
DR. CRYSTAL NNENNE AZU MD (NPI 1114457769) is an individual cardiovascular disease provider in Saint Louis, Missouri, licensed in Missouri (2024030894) and active in the NPI registry since June 2017. She is enrolled in Medicare PECOS, is affiliated with Alton Memorial Hospital, and is a graduate of University Of Chicago, Pritzker School Of Medicine (2017).
NPPES Registry Identity
Specialties & Licenses 3
Other Identifiers 1
Medicare Participation & PECOS CMS
Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.
Medicare Enrollment Status
Enrolled in Medicare and accepts Medicare assignment
Dr. Crystal Nnenne Azu Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.
Medicare Billing Reassignments
5Medicare enrollment records show Crystal Azu reassigns Medicare billing to 5 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.
Saint Louis, MO 63110
- Reassigned Medicare billing, Missouri enrollment
- Also billed through NPI 1992746903 (Missouri)
- 373 clinicians in this Medicare group
Creve Coeur, MO 63141
- Reassigned Medicare billing, Missouri enrollment
- 45 clinicians in this Medicare group
Rolla, MO 65401
- Reassigned Medicare billing, Missouri enrollment
- 347 clinicians in this Medicare group
Summerfield, NC 27358
- Reassigned Medicare billing, North Carolina enrollment
- 691 clinicians in this Medicare group
Greensboro, NC 27403
- Reassigned Medicare billing, North Carolina enrollment
- 835 clinicians in this Medicare group
Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.
Areas of Expertise CMS Part B claims 5
Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.
Hospital Affiliations CMS Care Compare 5
Hospitals where this provider delivers care, identified from recent Medicare claims and place-of-service records.
Alton Memorial Hospital
Acute Care Hospitals · Alton, ILMemorial Hospital
Acute Care Hospitals · Belleville, ILBarnes Jewish Hospital
Acute Care Hospitals · Saint Louis, MOMissouri Baptist Medical Center
Acute Care Hospitals · Town And Country, MOBarnes-Jewish West County Hospital
Acute Care Hospitals · Creve Coeur, MOPhysician Visit Costs CMS claims · ZIP area
Typical Medicare office-visit costs in the 63110 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.
Other Providers at the Same Location NPPES 20
Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
SAINT LOUIS, MO 63110
Frequently Asked Questions NPPES & CMS
Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.
What is Crystal Azu's NPI number?
The NPI number for Crystal Azu is 1114457769. It was assigned to this individual provider in the NPPES registry on June 15, 2017.
Where is Crystal Azu located?
Crystal Azu practices at 4921 Parkview Pl Div Im Cardiology, Ste 8B, Saint Louis, MO 63110. The listed phone number is (314) 362-1291.
What is Crystal Azu's specialty?
The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.
Is Crystal Azu enrolled in Medicare?
Yes. Crystal Azu is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.
Which organizations bill Medicare for Crystal Azu's services?
According to the CMS Revalidation Reassignment List (October 2026 release), Crystal Azu reassigns Medicare benefits to 5 organizations: Washington University (Saint Louis, MO), Heart Care Institute LLC (Creve Coeur, MO), Miracl, LLC (Rolla, MO), Moses Cone Physician Services, Inc. (Summerfield, NC) and The Moses H. Cone Memorial Hospital Operating Corporation (Greensboro, NC). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Crystal Azu's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.
Is Crystal Azu affiliated with any hospitals?
According to CMS data, Crystal Azu is affiliated with Alton Memorial Hospital, Memorial Hospital, Barnes Jewish Hospital, Missouri Baptist Medical Center and Barnes-Jewish West County Hospital.
When was this NPI record last updated?
The NPPES record for Crystal Azu was last updated on April 15, 2025. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.
# Dr. Crystal Nnenne Azu, MD · NPI 1114457769
Cardiovascular Disease physician in Saint Louis, Missouri. Individual provider, active in the CMS NPPES registry since June 15, 2017.
## Identity
- **NPI:** 1114457769 (Entity type: Individual)
- **Enumerated:** June 15, 2017
- **Primary specialty:** Internal Medicine - Cardiovascular Disease · taxonomy 207RC0000X
- **State license:** 2024030894 (Missouri)
- **Sole proprietor:** No
## Practice location
- **Address:** 4921 PARKVIEW PL, DIV IM CARDIOLOGY, STE 8B, Saint Louis, MO 63110-1032
- **Phone:** (314) 362-1291 · **Fax:** (314) 362-4278
## Medicare
- **Medicare:** Enrolled (PECOS); accepts Medicare assignment
- **Ordering & referring:** eligible for Part B labs & imaging, durable medical equipment, home health, power mobility devices
- **Bills Medicare through:** 5 organizations under Medicare reassignment (form CMS-855R): Washington University (NPI 1962442475, Saint Louis, MO); Heart Care Institute LLC (NPI 1881975308, Creve Coeur, MO); Miracl, LLC (NPI 1205304300, Rolla, MO); Moses Cone Physician Services, Inc. (NPI 1124574827, Summerfield, NC); The Moses H. Cone Memorial Hospital Operating Corporation (NPI 1013265909, Greensboro, NC) · CMS Revalidation Reassignment List, October 2026 release
- **Medical school:** University Of Chicago, Pritzker School Of Medicine, class of 2017
## Record status
- **NPPES last updated:** April 15, 2025
- **Other identifiers:** Medicaid 200146372 (MO)
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Source: [NPI Profile](https://npiprofile.com/npi/1114457769) · Data from the CMS NPPES public registry.