Active NPI 1629474028 Individual Practitioner Female Practitioner

Marissa Johnson , PA-C

Physician Assistant • Austin, TX

✓ Accepts Medicare Assignment Telehealth Available

Professional Overview & Biography Verified Profile Summary

Marissa Johnson, PA-C is a certified Physician Assistant practicing in Austin, TX. With approximately 12 years of clinical experience since completing medical education in 2014, Marissa Johnson delivers high-quality medical care to the local community at 8015 SHOAL CREEK BLVD STE 103.

Marissa Johnson accepts Medicare assignment . Telehealth and virtual consultation options are available for eligible patients.

Frequently performed procedures and clinical services include hospital observation care on day of discharge, hospital observation care, routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

8015 Shoal Creek Blvd Ste 103

Austin, TX 787578051

Telephone 5124677246

Fax 5124677247

Associated Practice Facility / Clinic

🏢 Capitol Pain Institute, Pa Facility NPI 1548303985

Medicare Profile & Education

Medical School

Other

Graduation Year

2014

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

Telehealth Services Available

Specialty Benchmarks & Practice Insights

Comparative analytics for Physician Assistant in Austin, TX

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

12 Yrs +2.1 yrs vs City Avg

City Avg: 9.9 Yrs

State Avg: 13.9 Yrs

Regional Practice Density

611 Specialists

Practicing in Austin, TX (11140 Statewide)

Telehealth Adoption Rate

15.5% Regional Adoption

✓ Offers Virtual Consultations

Medicare Pricing Discount

89.8% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Johnson (12 Years) 12 Yrs

Austin Specialty Average (9.9 Years) 9.9 Yrs

Performed Procedures & Service Volume

Top Medicare Part B procedures performed by this practitioner

CMS Official Data (2021)

Reporting Year:

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99217 Hospital observation care on day of discharge	29	29	$584.61	$59.36

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99217 Hospital observation care on day of discharge	85	85	$197.88	$61.84
99220 Hospital observation care, typically 70 minutes	71	69	$502.32	$156.65
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	32	29	$22.97	$7.19
99236 Initial hospital care with same-day admission and discharge with high level of medical decision making, per day, if using time, at least 85 minutes	24	24	$590.00	$184.04
99219 Hospital observation care, typically 50 minutes	22	22	$374.27	$114.66

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99217 Hospital observation care on day of discharge	94	92	$193.00	$61.54
99220 Hospital observation care, typically 70 minutes	82	82	$491.00	$156.12
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	44	38	$22.00	$7.18
99219 Hospital observation care, typically 50 minutes	32	32	$360.00	$115.15
99236 Initial hospital care with same-day admission and discharge with high level of medical decision making, per day, if using time, at least 85 minutes	21	21	$576.00	$184.93

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	129	99	$230.00	$88.22
99217 Hospital observation care on day of discharge	81	81	$184.00	$61.13
99220 Hospital observation care, typically 70 minutes	67	67	$468.69	$154.84
G0483 Drug test(s), definitive, utilizing (1) drug identification methods able to identify individual drugs and distinguish between structural isomers (but not necessarily stereoisomers), including, but not limited to gc/ms (any type, single or tandem) and lc/ms	51	44	$824.00	$248.79
93010 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report only	46	37	$22.00	$7.00
80305 Testing for presence of drug, read by direct observation	41	37	$34.00	$11.21
99219 Hospital observation care, typically 50 minutes	30	30	$344.70	$114.59
80307 Testing for presence of drug, by chemistry analyzers	11	11	$220.91	$59.80

Medical Specialties & State Licenses

CMS Verified: 2025-11-26

Physician Assistant Primary Specialty

NUCC Taxonomy Code: 363A00000X

A physician assistant is a person who has successfully completed an accredited education program for physician assistant, is licensed by the state and is practicing within the scope of that license. Physician assistants are formally trained to perform many of the routine, time-consuming tasks a physician can do. In some states, they may prescribe medications. They take medical histories, perform physical exams, order lab tests and x-rays, and give inoculations. Most states require that they work under the supervision of a physician.

Secondary Practice Locations

3613 Williams Dr Ste 802

Georgetown, TX 786281374

Phone: 5124677246

Practice Associates & Co-Workers

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

22 Associated Practitioners

Ivona Yaneva , FNP-BC

Nurse Practitioner - Family

NPI 1164307492

Family Nurse Practitioner (Board Certified)

Sarah Zoeller , FNP-C

Nurse Practitioner - Family

NPI 1164928289

Family Nurse Practitioner (Certified)

Julia Grove , CRNA

Nurse Anesthetist, Certified Registered

NPI 1215119219

Certified Registered Nurse Anesthetist

Saraswati Bhetwal , AGACNP-BC

Nurse Practitioner - Gerontology

NPI 1346048337

Adult-Gerontology Acute Care Nurse Practitioner (Board Certified)

Dr. Gretchen Crook , MD

Family Medicine

NPI 1346255403

Doctor of Medicine (M.D.)

Lauren Crider

Nurse Practitioner - Family

NPI 1366049553

Career & Practice History Timeline

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

13 Historical Events

📍

Updated Practice Location November 26, 2025

Registered at 8015 SHOAL CREEK BLVD STE 103, AUSTIN, TX 787578051 (Tel: 5124677246)

📍

Updated Business Mailing Address November 26, 2025

Registered at 7951 SHOAL CREEK BLVD STE 300, SUITE 201, AUSTIN, TX 787577582 (Tel: 5125848404)

✅

NPI Profile Active April 10, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location April 10, 2017

Registered at 901 W BEN WHITE BLVD, SUITE 201, AUSTIN, TX 787046903 (Tel: 5128161116)

📍

Updated Business Mailing Address April 10, 2017

Registered at 901 W BEN WHITE BLVD, SUITE 201, AUSTIN, TX 787046903

👤

Provider Name / Credentials Updated April 10, 2017

Recorded as MARISSA JOHNSON, PA-C

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) April 10, 2017

Physician Assistant

✅

NPI Profile Active November 12, 2014

NPI status registered as active in NPPES database

📍

Updated Practice Location November 12, 2014

Registered at 2000 S MAYS ST, SUITE 201, ROUND ROCK, TX 786647531 (Tel: 5122444272)

📍

Updated Business Mailing Address November 12, 2014

Registered at 2000 S MAYS ST, SUITE 201, ROUND ROCK, TX 786647531 (Tel: 5122444272)

👤

Provider Name / Credentials Updated November 12, 2014

Recorded as MARISSA CADENA, PA-C

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) November 12, 2014

Physician Assistant

🟢

Initial NPI Registration & Enumeration November 12, 2014

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: 1629474028

Entity Type:

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

Enumeration Date: November 12, 2014

Last Update: November 26, 2025

Sole Proprietor: No

Update or Correct Profile

Mailing Address

7951 Shoal Creek Blvd Ste 300, Suite 201

Austin, TX 787577582

Phone: 5125848404

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.