Active NPI 1417307505 Individual Practitioner Male Practitioner

Dr. Kent Alexander Neil Cassmeyer , MD

Internal Medicine • O Fallon, MO

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Dr. Kent Alexander Cassmeyer, MD is a certified Internal Medicine practicing in O Fallon, MO. With approximately 11 years of clinical experience since completing medical education in 2015, Dr. Cassmeyer delivers high-quality medical care to the local community at 300 WINDING WOODS DR STE 214.

Dr. Cassmeyer maintains professional affiliations with Aging Well Health Care, Llc, Mercy Clinic East Communities 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

300 Winding Woods Dr Ste 214

O Fallon, MO 633664773

Telephone 6366143289

Fax 6362723680

Medicare Profile & Education

Medical School

Other

Graduation Year

2015

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in O Fallon, MO

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

11 Yrs -13.1 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

38.9% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Cassmeyer (11 Years) 11 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	195	134	$176.00	$121.20
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	113	113	$215.00	$124.39
99213 Established patient office or other outpatient visit, typically 15 minutes	53	46	$125.00	$87.49
G0008 Administration of influenza virus vaccine	29	29	$39.00	$31.21
90662 Influenza vaccine split virus, preservative free	25	25	$138.00	$81.42
G2211 Visit complexity inherent to evaluation and management associated with medical care services that serve as the continuing focal point for all needed health care services and/or with medical care services that are part of ongoing care related to a patient's	17	17	$38.00	$15.82
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	15	15	$247.00	$163.46
G0009 Administration of pneumococcal vaccine	15	15	$39.00	$31.21
90677 Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use	15	15	$529.00	$288.40

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	258	166	$174.57	$124.93
99213 Established patient office or other outpatient visit, typically 15 minutes	166	112	$123.16	$89.00
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	115	115	$215.00	$128.07
G0008 Administration of influenza virus vaccine	28	28	$39.00	$29.94
90662 Influenza vaccine split virus, preservative free	23	23	$138.00	$71.93
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	19	15	$246.37	$169.37
G0009 Administration of pneumococcal vaccine	16	16	$39.00	$29.94
90677 Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use	15	15	$529.00	$282.24

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	227	137	$122.00	$88.68
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	84	84	$215.00	$130.96
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	75	61	$173.00	$123.61
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	48	41	$75.40	$55.90
G0008 Administration of influenza virus vaccine	34	34	$39.00	$29.00
90662 Influenza vaccine split virus, preservative free	31	31	$114.13	$68.43
G0009 Administration of pneumococcal vaccine	25	25	$39.00	$29.10
90677 Pneumococcal conjugate vaccine, 20 valent (pcv20), for intramuscular use	22	22	$529.00	$278.69
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	11	11	$168.00	$104.73

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	124	84	$117.08	$91.89
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	90	60	$73.21	$56.23
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	80	80	$214.25	$133.73
90662 Influenza vaccine split virus, preservative free	47	47	$87.77	$65.17
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	40	40	$168.00	$108.28
G0008 Administration of influenza virus vaccine	34	34	$39.00	$16.79
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	29	29	$258.00	$169.18
90732 Vaccine for pneumococcal polysaccharide for injection beneath the skin or into muscle, patient 2 years or older	25	25	$160.00	$124.96
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	25	24	$170.60	$130.46
G0009 Administration of pneumococcal vaccine	20	20	$39.00	$16.75

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	89	55	$112.00	$74.77
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	48	48	$258.00	$160.92
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	32	32	$168.00	$105.11
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	25	25	$209.76	$115.10
G0008 Administration of influenza virus vaccine	25	25	$39.00	$16.53
90662 Influenza vaccine split virus, preservative free	23	23	$77.00	$60.98
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	22	21	$68.00	$45.28
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	19	15	$167.00	$108.00

Medical Specialties & State Licenses

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License MO 2019024541

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.

Hospital & Practice Group Affiliations

Mercy Clinic East Communities

621 S New Ballas Rd, Saint Louis, MO 631418269

Phone: 3148729192

Mercy Clinic East Communities

300 Winding Woods Dr, O Fallon, MO 633664773

Aging Well Health Care, Llc

7212 Balson Ave, Saint Louis, MO 631303001

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

1 Associated Practitioners

Dr. Sarah Jackson , DO

Family Medicine

NPI 1134858392

Doctor of Osteopathic Medicine (D.O.)

Career & Practice History Timeline

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

11 Historical Events

👤

Provider Name / Credentials Updated August 28, 2019

Recorded as KENT ALEXANDER CASSMEYER, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) August 28, 2019

Internal Medicine (License #2019024541 in MO)

📍

Updated Practice Location June 19, 2019

Registered at 300 WINDING WOODS DR STE 214, O FALLON, MO 633664773 (Tel: 6366143289)

📍

Updated Business Mailing Address June 19, 2019

Registered at 300 WINDING WOODS DR STE 214, O FALLON, MO 633664773 (Tel: 6366143289)

👤

Provider Name / Credentials Updated June 19, 2019

Recorded as KENT CASSMEYER, MD

✅

NPI Profile Active June 20, 2016

NPI status registered as active in NPPES database

📍

Updated Practice Location June 20, 2016

Registered at 1 HOSPITAL DR, DC043.00, COLUMBIA, MO 652121000 (Tel: 5738849066)

📍

Updated Business Mailing Address June 20, 2016

Registered at 1 HOSPITAL DR, DC043.00, COLUMBIA, MO 652121000 (Tel: 5738841606)

👤

Provider Name / Credentials Updated June 20, 2016

Recorded as KENT CASSMEYER

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 20, 2016

Internal Medicine (License #2016016857 in MO)

🟢

Initial NPI Registration & Enumeration June 20, 2016

First registered as active Individual Practitioner in NPPES Database.

Patient & Community Reviews

Verified patient ratings, medical care experiences, and facility photos

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NPI Administrative Meta

NPI Number: 1417307505

Entity Type:

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

Enumeration Date: June 20, 2016

Last Update: August 28, 2019

Sole Proprietor: No

Update or Correct Profile

Mailing Address

300 Winding Woods Dr Ste 214

O Fallon, MO 633664773

Phone: 6366143289

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.