GEORGE PHELAN AHLERING, MD — NPI 1851334957 (Board-Certified Obstetrician & Gynecologist (Women's Health & Pregnancy Doctor) in CHESTERFIELD, MO)

CMS-1500 Box 24J / 33a • NPI

1851334957

Type 1 Individual Rendering/Ordering

HIPAA NUCC Taxonomy • CMS Code

207VG0400X (CMS 16)

Board-Certified Obstetrician & Gynecologist (Women's Health & Pregnancy Doctor)

Box 32 Service Location & ZIP+4

16216 BAXTER RD, SUITE 100, CHESTERFIELD, MO, 63017-4770

✓ 9-Digit EDI 837 ZIP+4 (63017-4770)

Practice Phone & Referral Fax

(636) 449-4700

Fax: (636) 449-2596

✓ HHS OIG LEIE Sanction Screening — VERIFIED CLEAR: NPI 1851334957 (GEORGE PHELAN AHLERING, MD) 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	`1851334957` (NPI-1 Individual Practitioner)
Provider / Legal Name	GEORGE PHELAN AHLERING, MD
Plain-English Specialty	Board-Certified Obstetrician & Gynecologist (Women's Health & Pregnancy Doctor) NUCC Code: `207VG0400X` (Obstetrics & Gynecology, Gynecology)
Certifying / Licensing Body	American Board of Obstetrics and Gynecology (ABOG)
Practice Location Address	16216 BAXTER RD, SUITE 100, CHESTERFIELD, MO, 63017-4770
Practice Telephone / Fax	Tel: (636) 449-4700 \| Fax: (636) 449-2596
Administrative Mailing Address	16216 BAXTER RD, CHESTERFIELD, MO, 63017-4770
Enumeration & Last Sync	Enumerated: 2006-06-14 \| CMS Record Updated: 2007-10-16

Clinic Location, Accessibility & Directions

📍 Practice Location & Patient Access

16216 BAXTER RD, SUITE 100, CHESTERFIELD, MO, 63017-4770

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Plain-English Taxonomy & CMS Crosswalk (207VG0400X)

What Does Taxonomy Code 207VG0400X Mean?

In the HIPAA National Uniform Claim Committee (NUCC) classification, code 207VG0400X translates to:
"Board-Certified Obstetrician & Gynecologist (Women's Health & Pregnancy Doctor)"

CMS-1500 Medicare Specialty Crosswalk: CMS Code 16 (Physician/Obstetrics & Gynecology)
Certifying / Accrediting Authority: American Board of Obstetrics and Gynecology (ABOG)
Clinical Scope: Pregnancy confirmation and prenatal care, Pap smears and HPV vaccination, menstrual irregularities, pelvic pain, PCOS, or menopause management.

Specialty Clinical Procedures & Therapeutic Classes

Standard Scope of Care (GEORGE PHELAN AHLERING, MD)

Typical CPT / Diagnostic Procedures:

Comprehensive Antenatal Care, Fetal Ultrasound & Labor/Delivery
Cervical Cytology (Pap Smear), HPV Co-Testing & Colposcopy
Pelvic Ultrasound & Minimally Invasive Laparoscopic Hysterectomy/Myomectomy

Common Therapeutic Classes:

Prenatal Folic Acid, Iron & Progesterone Supplementation
Combined Oral Contraceptives, Levonorgestrel IUDs & Hormone Therapy
Fluconazole, Metronidazole & Pregnancy-Safe Beta-Lactam Antibiotics (Ampicillin)

All Registered NUCC Taxonomies & State Licenses

Taxonomy Code & Plain-English Description	State License & Primary Status
`207VG0400X` — Obstetrics & Gynecology, Gynecology Plain English: Board-Certified Obstetrician & Gynecologist (Women's Health & Pregnancy Doctor)	State: MO \| License: `R2D12` \| Primary: Yes (Primary)

Medical Billing, RCM & Hospital Credentialing Teams:

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GEORGE PHELAN AHLERING, MD (NPI #1851334957)