Endocrine Associates, LLC

Primary specialty

Endocrinology, Diabetes & Metabolism PhysicianTaxonomy code 207RE0101X

Legal business name

ENDOCRINE ASSOCIATES, LLC

Practice address

224 S Woods Mill Rd Ste 480S
Chesterfield, MO 63017-3609

Phone

(636) 685-7744

Fax

(314) 590-5957

NPI assigned

Oct 24, 2016

Last updated

Mar 5, 2026By the provider in NPPES

Organization subpart

Yes

Parent organization

ST. LUKES MEDICAL GROUPAs reported in NPPES

Registry information is reported by the provider to CMS and is not verified. About this source

Authorized official

Name

Darren R. Haskell, M.D.NPI 1689636813

Title

Chief Medical Officer

Phone

(314) 205-6444

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in MO

Enrollment records 1

These CMS records do not include an NPI. They are shown because their name and street address match this provider’s.

CLIA laboratory certificates

Part of

St Lukes Medical Group

Locations

Parent organization (reported in NPPES) 1

This organization reports itself as a subpart in NPPES; the parent’s legal name matches this organization in the same state.

• St. Lukes Medical Group

  • Family Medicine Physician
  • Chesterfield, MO
  • NPI 1215308945
  NPPES parent name

Practitioners 6

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles, and the practitioner matching its NPPES authorized official.

• Vaishaliben Ahir, MD

  • Endocrinology, Diabetes & Metabolism Physician
  • Chesterfield, MO
  • NPI 1376706861
  Medicare reassignment Care Compare group NPD
• Karen J Chang-Chen, MD

  • Endocrinology, Diabetes & Metabolism Physician
  • Chesterfield, MO
  • NPI 1508916495
  Medicare reassignment Care Compare group NPD
• Mireille El Hayek, M.D.

  • Endocrinology, Diabetes & Metabolism Physician
  • Saint Louis, MO
  • NPI 1912139940
  Medicare reassignment Care Compare group NPD
• Soumya M Nadella, M.D.

  • Endocrinology, Diabetes & Metabolism Physician
  • Chesterfield, MO
  • NPI 1316350028
  Medicare reassignment Care Compare group NPD
• Hassan A Ahmad, M.D

  • Allergy & Immunology Physician
  • Chesterfield, MO
  • NPI 1194138024
  Medicare reassignment NPD
• Darren R. Haskell, M.D.

  • Internal Medicine Physician
  • Chesterfield, MO
  • NPI 1689636813
  Authorized official Same address or phone

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1477267200000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1772668800000",
    "number": "1134670367",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "224 S WOODS MILL RD STE 480S",
            "city": "CHESTERFIELD",
            "state": "MO",
            "postal_code": "630173609",
            "telephone_number": "636-685-7744",
            "fax_number": "314-590-5957"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "224 S WOODS MILL RD STE 480S",
            "city": "CHESTERFIELD",
            "state": "MO",
            "postal_code": "630173609",
            "telephone_number": "636-685-7744",
            "fax_number": "314-590-5957"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "2315 Dougherty Ferry Rd Ste 109B",
            "address_purpose": "LOCATION",
            "city": "Saint Louis",
            "state": "MO",
            "postal_code": "631223383",
            "country_code": "US",
            "telephone_number": "314-965-9133",
            "fax_number": "314-984-2793",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "organization_name": "ENDOCRINE ASSOCIATES, LLC",
        "organizational_subpart": "YES",
        "parent_organization_legal_business_name": "ST. LUKES MEDICAL GROUP",
        "enumeration_date": "2016-10-24",
        "last_updated": "2026-03-05",
        "certification_date": "2026-03-05",
        "status": "A",
        "authorized_official_last_name": "HASKELL",
        "authorized_official_first_name": "DARREN",
        "authorized_official_middle_name": "R.",
        "authorized_official_title_or_position": "CHIEF MEDICAL OFFICER",
        "authorized_official_telephone_number": "314-205-6444",
        "authorized_official_credential": "M.D."
    },
    "taxonomies": [
        {
            "code": "207RE0101X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Internal Medicine, Endocrinology, Diabetes & Metabolism",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jasmine Ellis
• James Ellison, MD
• Andrew William Elston, DPT
• Emergency Physicians of St. Luke's, LLC
• Endocrine & Obesity Solutions LLC
• Melissa A Engelson, D.C.
• Danielle Nichole Engle, D.C.
• ENT Associates, Inc
• Epideme Enterprise Healthcare LLC (Epideme Healthcare)
• Mary G Epperson, PNP

• Endocrinology, Diabetes & Metabolism Physician in Chesterfield, MO
• Providers in Chesterfield, MO by specialty
• Endocrinology, Diabetes & Metabolism Physician in Missouri

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 5, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.