Active NPI 1609040609 Individual Practitioner Male Practitioner

Dr. Richard Williamson , MD

Neurological Surgery • Chandler, AZ

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Richard Williamson, MD is a certified Neurological Surgery practicing in Chandler, AZ. With approximately 17 years of clinical experience since graduating from University Of Pittsburgh School Of Medicine in 2009, Dr. Williamson delivers high-quality medical care to the local community at 1875 W FRYE RD STE 300.

Dr. Williamson is affiliated with Neurosurgical Associates Ltd and accepts Medicare assignment.

Frequently performed procedures and clinical services include established patient outpatient office visit, initial hospital care with straightforward or low-level medical decision making, if using time, at least, new patient outpatient office visit. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

1875 W Frye Rd Ste 300

Chandler, AZ 852246184

Telephone 4809175600

Fax 6022948286

Associated Practice Facility / Clinic

🏢 Neurosurgical Associates, Ltd Facility NPI 1568859403

Medicare Profile & Education

Medical School

University Of Pittsburgh School Of Medicine

Graduation Year

2009

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Neurological Surgery in Chandler, AZ

Established Specialist (10-20 Yrs)

Practitioner Clinical Experience

17 Yrs -4.6 yrs vs City Avg

City Avg: 21.6 Yrs

State Avg: 23.2 Yrs

Regional Practice Density

8 Specialists

Practicing in Chandler, AZ (209 Statewide)

Telehealth Adoption Rate

37.5% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

81.9% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Williamson (17 Years) 17 Yrs

Chandler Specialty Average (21.6 Years) 21.6 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
99213 Established patient office or other outpatient visit, typically 15 minutes	99	86	$264.22	$88.34
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	48	42	$382.50	$123.84
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	35	35	$436.06	$127.21
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	32	32	$556.75	$163.61
99221 Initial hospital inpatient care per day, typically 30 minutes	26	26	$274.50	$80.64
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	24	24	$408.92	$107.17
75898 Imaging of blood vessel	21	14	$353.48	$88.17
61624 Occlusion of central nervous system or spinal cord artery	18	14	$10321.17	$1039.63
75894 Radiological supervision and interpretation of obstruction of blood vessel via catheter	18	15	$267.78	$69.26
61645 Removal of blood clot and injection to dissolve blood clot from head artery using fluoroscopic guidance, accessed through skin	16	16	$2972.19	$823.48
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	15	15	$527.47	$168.00
76937 Ultrasonic guidance for blood vessel access	15	14	$61.00	$13.60
36224 Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist	13	11	$1452.54	$418.77

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	114	99	$264.04	$80.42
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	91	80	$372.59	$119.73
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	70	68	$385.94	$125.59
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	65	41	$223.51	$77.61
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	44	44	$485.25	$154.91
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	29	27	$528.45	$150.03
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	18	18	$516.56	$170.19
99221 Initial hospital inpatient care per day, typically 30 minutes	16	16	$247.06	$78.71
76937 Ultrasonic guidance for blood vessel access	15	13	$41.07	$13.94
36226 Insertion of tube into brain artery for diagnosis or treatment with review by radiologist	14	13	$1294.36	$258.70
99205 New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more	13	13	$649.77	$214.11
61645 Removal of blood clot and injection to dissolve blood clot from head artery using fluoroscopic guidance, accessed through skin	12	12	$2482.00	$822.54
36224 Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist	12	12	$1967.75	$488.86

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	135	115	$259.47	$82.29
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	81	76	$390.15	$132.61
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	81	71	$366.89	$121.78
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	71	43	$205.44	$69.95
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	41	41	$479.00	$164.76
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	22	21	$530.27	$171.93
99203 New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more	17	17	$329.71	$103.77

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	138	112	$261.00	$88.01
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	95	90	$381.00	$134.48
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	58	36	$201.00	$71.06
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	55	52	$370.00	$124.97
76937 Ultrasonic guidance for blood vessel access	17	15	$39.00	$13.87
99212 Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more	16	16	$162.00	$53.53
36224 Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist	15	15	$1582.40	$456.32
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	11	11	$562.00	$198.08
36226 Insertion of tube into brain artery for diagnosis or treatment with review by radiologist	11	11	$1022.00	$194.55

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99213 Established patient office or other outpatient visit, typically 15 minutes	118	105	$201.00	$72.99
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	118	115	$377.80	$136.97
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	88	54	$200.00	$72.19
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	40	37	$294.00	$107.97
76937 Ultrasonic guidance for blood vessel access	35	31	$45.57	$14.71
36224 Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist	28	24	$8100.86	$398.54
99152 Moderate sedation services by physician also performing a procedure, patient 5 years of age or older, first 15 minutes	21	21	$77.00	$12.54
76377 3D radiographic procedure with computerized image postprocessing	17	16	$125.24	$40.40
36226 Insertion of tube into brain artery for diagnosis or treatment with review by radiologist	15	15	$8436.40	$274.89

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	160	66	$181.00	$72.15
99213 Established patient office or other outpatient visit, typically 15 minutes	120	105	$179.00	$69.96
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	109	107	$341.00	$134.95
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	83	73	$264.00	$101.71
76937 Ultrasonic guidance for blood vessel access	38	33	$47.00	$13.85
36224 Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist	29	24	$4800.00	$384.85
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	27	27	$505.00	$200.64
99152 Moderate sedation services by physician also performing a procedure, patient 5 years of age or older, first 15 minutes	25	24	$124.00	$11.14
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	24	23	$357.00	$133.93
99238 Hospital discharge day management, 30 minutes or less	21	21	$181.00	$72.19
36226 Insertion of tube into brain artery for diagnosis or treatment with review by radiologist	18	18	$4750.00	$201.31
76377 3D radiographic procedure with computerized image postprocessing	17	15	$129.76	$38.01
61645 Removal of blood clot and injection to dissolve blood clot from head artery using fluoroscopic guidance, accessed through skin	15	15	$2128.00	$842.12
35301 Removal of blood clot and portion of artery of neck	12	11	$2923.00	$1088.74
99221 Initial hospital inpatient care per day, typically 30 minutes	12	12	$253.00	$100.85
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	12	12	$405.00	$145.27
61624 Occlusion of central nervous system or spinal cord artery	11	11	$2974.00	$1193.84

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	160	77	$179.76	$71.44
99213 Established patient office or other outpatient visit, typically 15 minutes	144	115	$177.13	$68.74
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	96	91	$340.08	$135.03
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	60	51	$260.00	$101.39
99221 Initial hospital inpatient care per day, typically 30 minutes	46	45	$252.13	$100.19
76937 Ultrasonic guidance for blood vessel access	39	37	$51.15	$13.71
36224 Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist	28	25	$4552.25	$444.75
99152 Moderate sedation services by physician also performing a procedure, patient 5 years of age or older, first 15 minutes	25	25	$123.80	$12.17
36226 Insertion of tube into brain artery for diagnosis or treatment with review by radiologist	19	18	$4479.95	$218.78
76377 3D radiographic procedure with computerized image postprocessing	15	14	$120.00	$37.18
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	12	12	$505.00	$200.07
99238 Hospital discharge day management, 30 minutes or less	12	12	$180.33	$71.84
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more	12	12	$345.33	$134.28

HCPCS Code & Description	Services	Patients	Submitted Charge	Medicare Allowed
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	95	48	$175.00	$70.14
99213 Established patient office or other outpatient visit, typically 15 minutes	81	59	$164.00	$69.80
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	50	49	$337.00	$132.20
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	49	47	$495.00	$198.80
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	37	33	$240.00	$101.58
99221 Initial hospital inpatient care per day, typically 30 minutes	35	35	$248.00	$97.08
99204 New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more	31	31	$370.00	$154.62
76937 Ultrasonic guidance for blood vessel access	26	21	$49.08	$14.28
99233 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 50 minutes	25	17	$253.00	$102.42
36224 Insertion of tube into internal neck artery for diagnosis or treatment with review by radiologist	16	12	$4557.06	$417.33
36226 Insertion of tube into brain artery for diagnosis or treatment with review by radiologist	14	14	$4373.00	$309.96

Medical Specialties & State Licenses

CMS Verified: 2025-05-08

Neurological Surgery Primary Specialty

NUCC Taxonomy Code: 207T00000X

State License AZ 47644

A neurological surgeon provides the operative and non-operative management (i.e., prevention, diagnosis, evaluation, treatment, critical care, and rehabilitation) of disorders of the central, peripheral, and autonomic nervous systems, including their supporting structures and vascular supply; the evaluation and treatment of pathological processes which modify function or activity of the nervous system; and the operative and non-operative management of pain. A neurological surgeon treats patients with disorders of the nervous system; disorders of the brain, meninges, skull, and their blood supply, including the extracranial carotid and vertebral arteries; disorders of the pituitary gland; disorders of the spinal cord, meninges, and vertebral column, including those which may require treatment by spinal fusion or instrumentation; and disorders of the cranial and spinal nerves throughout their distribution.

Neurological Surgery

NUCC Taxonomy Code: 207T00000X

State License PA MD457377

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

103120121 (PA)

Medicaid State Provider ID

186944 (AZ)

Hospital & Practice Group Affiliations

Neurosurgical Associates Ltd

3420 S Mercy Rd, Gilbert, AZ 852970424

Phone: 4806817134

Practice Associates & Co-Workers

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

17 Associated Practitioners

Kristi Smith , FNP

Nurse Practitioner - Family

NPI 1013254127

Family Nurse Practitioner

Dr. Joseph Abbatematteo , MD

Neurological Surgery

NPI 1073017083

Doctor of Medicine (M.D.)

Dr. Karam Moon , MD

Neurological Surgery

NPI 1104147909

Doctor of Medicine (M.D.)

Quincy Young , PA

Physician Assistant - Medical

NPI 1114618626

Physician Assistant

Chris Tran , ACNP, CRNFA

Nurse Practitioner - Acute Care

NPI 1144611054

Timothy Sharp , PA-C

Physician Assistant - Surgical

NPI 1306892997

Physician Assistant (Certified)

Career & Practice History Timeline

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

14 Historical Events

📍

Updated Practice Location May 08, 2025

Registered at 1875 W FRYE RD STE 300, CHANDLER, AZ 852246184 (Tel: 4809175600)

📍

Updated Business Mailing Address May 08, 2025

Registered at 2910 N 3RD AVE # 200, PHOENIX, AZ 850134434 (Tel: 6024063181)

✅

NPI Profile Active June 13, 2017

NPI status registered as active in NPPES database

📍

Updated Practice Location June 13, 2017

Registered at 320 E NORTH AVE STE 208, PITTSBURGH, PA 152124756 (Tel: 4123596200)

📍

Updated Business Mailing Address June 13, 2017

Registered at 320 E NORTH AVE STE 208, PITTSBURGH, PA 152124756 (Tel: 4123596200)

👤

Provider Name / Credentials Updated June 13, 2017

Recorded as RICHARD WILLIAMSON, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 13, 2017

Neurological Surgery (License #MD457377 in PA)

📍

Updated Practice Location January 17, 2017

Registered at 320 E NORTH AVE STE 208, PITTSBURGH, PA 152124756 (Tel: 4123596200)

✅

NPI Profile Active July 19, 2016

NPI status registered as active in NPPES database

📍

Updated Practice Location July 19, 2016

Registered at 320 E NORTH AVE FL 6, PITTSBURGH, PA 152124756 (Tel: 4123596110)

📍

Updated Business Mailing Address July 19, 2016

Registered at 320 E NORTH AVE STE 208, PITTSBURGH, PA 152124756 (Tel: 4123596200)

👤

Provider Name / Credentials Updated July 19, 2016

Recorded as RICHARD WILLIAMSON, MD

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) July 19, 2016

Neurological Surgery (License #MD457377 in PA)

🟢

Initial NPI Registration & Enumeration April 22, 2008

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: 1609040609

Entity Type:

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

Enumeration Date: April 22, 2008

Last Update: May 08, 2025

Sole Proprietor: No

Update or Correct Profile

Mailing Address

2910 N 3rd Ave # 200

Phoenix, AZ 850134434

Phone: 6024063181

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.