Active NPI 1689640609 Individual Practitioner Female Practitioner

Dr. Geraldine A. Ryan , MD

Internal Medicine • O Fallon, MO

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Dr. Geraldine Ryan, MD is a certified Internal Medicine practicing in O Fallon, MO. With approximately 38 years of clinical experience since graduating from Saint Louis University School Of Medicine in 1988, Dr. Ryan delivers high-quality medical care to the local community at 9426 PHOENIX VILLAGE PKWY.

Dr. Ryan maintains professional affiliations with Mercy Clinic East Communities, Aging Well Health Care, Llc and accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Frequently performed procedures and clinical services include established patient outpatient office visit, annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit, administration of influenza virus vaccine. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

9426 Phoenix Village Pkwy

O Fallon, MO 633684781

Telephone 6365615999

Fax 6365614746

Medicare Profile & Education

Medical School

Saint Louis University School Of Medicine

Graduation Year

1988

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in O Fallon, MO

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

38 Yrs +13.9 yrs vs City Avg

City Avg: 24.1 Yrs

State Avg: 25.5 Yrs

Regional Practice Density

17 Specialists

Practicing in O Fallon, MO (2747 Statewide)

Telehealth Adoption Rate

35.3% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount

39.1% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Ryan (38 Years) 38 Yrs

O Fallon Specialty Average (24.1 Years) 24.1 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2024)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	144	100	$176.00	$122.74
99213 Established patient office or other outpatient visit, typically 15 minutes	142	106	$125.00	$87.24
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	140	140	$215.00	$124.49
G0008 Administration of influenza virus vaccine	35	35	$39.00	$31.21
90662 Influenza vaccine split virus, preservative free	34	34	$138.00	$80.66
G0009 Administration of pneumococcal vaccine	22	22	$39.00	$31.21
90677 Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use	21	21	$529.00	$290.77

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	160	115	$123.69	$88.82
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	125	91	$174.87	$126.31
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	124	124	$215.00	$128.07
G0008 Administration of influenza virus vaccine	41	41	$39.00	$29.94
90662 Influenza vaccine split virus, preservative free	38	38	$135.58	$71.57
G0009 Administration of pneumococcal vaccine	17	17	$39.00	$29.94
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	14	14	$76.71	$52.88
90677 Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use	14	14	$529.00	$282.89
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	13	13	$168.00	$110.84

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	148	95	$122.00	$89.45
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	129	129	$215.00	$131.07
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	95	73	$173.00	$127.15
G0008 Administration of influenza virus vaccine	30	30	$39.00	$29.02
90662 Influenza vaccine split virus, preservative free	28	28	$113.07	$68.31
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	20	20	$179.25	$132.20
G0009 Administration of pneumococcal vaccine	20	20	$39.00	$29.29
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	12	12	$75.17	$56.62
93000 Routine ekg using at least 12 leads including interpretation and report	11	11	$60.00	$14.29
99495 Transitional care management services for problem of at least moderate complexity	11	11	$323.00	$206.81

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	233	142	$117.15	$91.59
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	129	129	$212.64	$133.73
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	91	74	$169.64	$129.19
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	27	27	$160.00	$125.25
90662 Influenza vaccine split virus, preservative free	23	23	$88.00	$65.26
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	23	23	$319.35	$169.53
G0008 Administration of influenza virus vaccine	23	23	$39.00	$16.80
G0402 Initial preventive physical examination; face-to-face visit, services limited to new beneficiary during the first 12 months of medicare enrollment	20	20	$252.00	$169.87
G0009 Administration of pneumococcal vaccine	19	19	$39.00	$16.76
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	18	17	$70.72	$54.12
93000 Routine ekg using at least 12 leads including interpretation and report	16	15	$60.00	$14.87
81002 Urinalysis, manual test	14	13	$16.00	$3.48

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	155	116	$112.00	$75.39
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	83	68	$167.00	$108.55
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	50	50	$209.16	$116.61
G0008 Administration of influenza virus vaccine	41	40	$39.00	$16.52
90662 Influenza vaccine split virus, preservative free	37	36	$77.00	$60.82
G0009 Administration of pneumococcal vaccine	22	22	$39.00	$16.47
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	22	22	$153.86	$118.47
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	15	15	$68.00	$44.43

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	192	129	$112.00	$73.74
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	118	85	$167.00	$107.26
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	85	85	$190.53	$115.48
G0009 Administration of pneumococcal vaccine	35	35	$39.00	$16.20
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	33	33	$144.67	$111.35
G0008 Administration of influenza virus vaccine	31	31	$39.00	$16.20
90662 Influenza vaccine split virus, preservative free	28	28	$77.00	$54.89
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	24	22	$68.00	$44.65
81003 Automated urinalysis test	16	14	$6.00	$2.44
93000 Routine ekg using at least 12 leads including interpretation and report	15	15	$60.00	$16.86

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	179	115	$112.00	$71.11
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	145	98	$167.00	$105.08
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	58	58	$163.62	$114.49
G0008 Administration of influenza virus vaccine	38	37	$38.58	$19.90
90662 Influenza vaccine split virus, preservative free	36	36	$69.92	$51.95
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	32	30	$68.00	$43.12
G0009 Administration of pneumococcal vaccine	25	25	$38.40	$19.90
93000 Routine ekg using at least 12 leads including interpretation and report	17	17	$60.00	$16.68
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	16	16	$142.88	$105.59
81003 Automated urinalysis test	15	12	$6.00	$2.71
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	12	12	$278.00	$168.81

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	220	124	$112.00	$70.32
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	102	75	$167.00	$103.39
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	45	45	$174.33	$112.95
G0008 Administration of influenza virus vaccine	39	37	$38.03	$24.52
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	36	32	$68.00	$42.47
G0009 Administration of pneumococcal vaccine	34	34	$38.00	$24.52
90662 Influenza vaccine split virus, preservative free	28	28	$58.00	$48.05
90670 Pneumococcal vaccine for injection into muscle	24	24	$298.00	$185.48
93000 Routine ekg using at least 12 leads including interpretation and report	19	19	$60.00	$16.60
G0438 Annual wellness visit; includes a personalized prevention plan of service (pps), initial visit	18	18	$278.00	$167.01
81003 Automated urinalysis test	18	14	$6.00	$2.80
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	11	11	$142.00	$96.08

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License MO 100756

A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.

Pediatrics

NUCC Taxonomy Code: 208000000X

State License MO 100756

A pediatrician is concerned with the physical, emotional and social health of children from birth to young adulthood. Care encompasses a broad spectrum of health services ranging from preventive healthcare to the diagnosis and treatment of acute and chronic diseases. A pediatrician deals with biological, social and environmental influences on the developing child, and with the impact of disease and dysfunction on development.

Additional State Medicaid & Healthcare Payer Identifiers

Commercial Insurance / Payer ID Railroad Medicare

110211326 (MO)

Hospital & Practice Group Affiliations

Aging Well Health Care, Llc

7212 Balson Ave, Saint Louis, MO 631303001

Mercy Clinic East Communities

2223 Technology Dr, O Fallon, MO 633687272

Mercy Clinic East Communities

621 S New Ballas Rd, Saint Louis, MO 631418269

Phone: 3148729192

Mercy Clinic East Communities

621 S New Ballas Rd, Saint Louis, MO 631418255

Phone: 3142516335

Practice Associates & Co-Workers

Healthcare professionals and specialists practicing at this location or sharing practice phone/fax

4 Associated Practitioners

Nicholas Johnson , FNP

Family Medicine

NPI 1164309985

Family Nurse Practitioner

Rachel Wells , FNP

Nurse Practitioner - Family

NPI 1336444520

Family Nurse Practitioner

Dr. Beth Zimmer , MD

Family Medicine

NPI 1548221823

Doctor of Medicine (M.D.)

Kevin Yin

Internal Medicine

NPI 1689311011

Career & Practice History Timeline

Chronological log of verified NPI updates, location relocations, credentials, and registry changes

6 Historical Events

✅

NPI Profile Active April 02, 2015

NPI status registered as active in NPPES database

📍

Updated Practice Location April 02, 2015

Registered at 9426 PHOENIX VILLAGE PKWY, O FALLON, MO 633684781 (Tel: 6365615999)

📍

Updated Business Mailing Address April 02, 2015

Registered at 9426 PHOENIX VILLAGE PKWY, O FALLON, MO 633684781 (Tel: 6365615999)

👤

Provider Name / Credentials Updated April 02, 2015

Recorded as GERALDINE RYAN, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) April 02, 2015

Internal Medicine (License #100756 in MO)

🟢

Initial NPI Registration & Enumeration February 28, 2006

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

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NPI Administrative Meta

NPI Number: 1689640609

Entity Type:

Individual Provider Physician, Nurse Practitioner, or Solo Healthcare Professional (Type 1 NPI)

Enumeration Date: February 28, 2006

Last Update: April 02, 2015

Sole Proprietor: No

Update or Correct Profile

Mailing Address

9426 Phoenix Village Pkwy

O Fallon, MO 633684781

Phone: 6365615999

Public Domain Record This profile contains public domain information published by CMS and NPPES under the Freedom of Information Act (FOIA).

⚠️ Medical Disclaimer

This directory listing is for informational purposes only and does not constitute medical advice, diagnosis, or physician endorsement. If you are experiencing a medical emergency, please call 911 immediately.