Active NPI 1578539516 Individual Practitioner Male Practitioner

Dr. Robert Siew , MD

Internal Medicine • Pasadena, CA

✓ Accepts Medicare Assignment

Professional Overview & Biography Verified Profile Summary

Dr. Robert Siew, MD is a certified Internal Medicine practicing in Pasadena, CA. With approximately 40 years of clinical experience since graduating from Tulane University School Of Medicine in 1986, Dr. Siew delivers high-quality medical care to the local community at 10 CONGRESS ST STE 155.

Dr. Siew accepts Medicare assignment.

Frequently performed procedures and clinical services include subsequent hospital care with moderate levelof medical decision making, if using time, at least, hospital discharge day management, initial hospital care with moderate level of medical decision making, if using time, at least. Full Medicare procedure pricing transparency rates and service volume details are listed on this profile.

Practice Location & Contact Primary Location

Practice Address

10 Congress St Ste 155

Pasadena, CA 911053027

Telephone 6265215331

Fax 6264860181

Associated Practice Facility / Clinic

🏢 Ashish B Patel Md Inc Facility NPI 1164786893

Medicare Profile & Education

Medical School

Tulane University School Of Medicine

Graduation Year

1986

Medicare Assignment

✓ Accepts Assignment

Telehealth Flag

In-Person Only

Specialty Benchmarks & Practice Insights

Comparative analytics for Internal Medicine in Pasadena, CA

Senior Veteran Specialist (>20 Yrs)

Practitioner Clinical Experience

40 Yrs +15.7 yrs vs City Avg

City Avg: 24.3 Yrs

State Avg: 26.6 Yrs

Regional Practice Density

149 Specialists

Practicing in Pasadena, CA (18502 Statewide)

Telehealth Adoption Rate

32.2% Regional Adoption

In-Person Office Visits Only

Medicare Pricing Discount

35.8% Avg Savings

Under CMS Medicare Fee Schedule vs Standard Submitted Charges

Clinical Seniority & Experience Comparison

Dr. Siew (40 Years) 40 Yrs

Pasadena Specialty Average (24.3 Years) 24.3 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
99232 Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes	2,441	526	$112.71	$77.27
99238 Hospital discharge day management, 30 minutes or less	556	463	$114.21	$80.48
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	535	447	$313.70	$170.11
99213 Established patient office or other outpatient visit, typically 15 minutes	111	71	$117.62	$94.67

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	2,040	429	$111.91	$83.21
99238 Hospital discharge day management, 30 minutes or less	574	438	$111.42	$85.77
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	541	419	$310.83	$182.50
99213 Established patient office or other outpatient visit, typically 15 minutes	135	85	$116.00	$98.67
99235 Initial hospital care with same-day admission and discharge with moderate level of medical decision making, per day, if using time, at least 70 minutes	37	37	$257.60	$167.96
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	15	15	$199.98	$136.61

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	2,846	532	$112.00	$75.93
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	639	484	$312.00	$211.00
99238 Hospital discharge day management, 30 minutes or less	634	478	$113.00	$77.30
99213 Established patient office or other outpatient visit, typically 15 minutes	184	95	$116.00	$100.62
99235 Initial hospital care with same-day admission and discharge with moderate level of medical decision making, per day, if using time, at least 70 minutes	35	35	$278.00	$175.36

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	2,717	651	$112.00	$77.09
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	624	514	$312.00	$214.95
99238 Hospital discharge day management, 30 minutes or less	614	523	$113.00	$78.21
99213 Established patient office or other outpatient visit, typically 15 minutes	177	83	$116.32	$101.82
99220 Hospital observation care, typically 70 minutes	29	29	$242.00	$195.42
99217 Hospital observation care on day of discharge	13	13	$113.00	$78.38

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	2,799	654	$114.96	$79.22
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	736	570	$324.79	$221.31
99238 Hospital discharge day management, 30 minutes or less	717	570	$119.91	$80.58
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	170	78	$205.00	$122.10
99213 Established patient office or other outpatient visit, typically 15 minutes	111	81	$140.00	$84.22
90662 Influenza vaccine split virus, preservative free	43	41	$75.00	$60.70
G0008 Administration of influenza virus vaccine	43	41	$50.00	$18.94
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	38	38	$220.00	$130.77
99239 Hospital discharge day management, more than 30 minutes	25	25	$175.00	$118.12

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	3,805	907	$115.00	$78.09
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	955	719	$325.00	$217.18
99238 Hospital discharge day management, 30 minutes or less	936	738	$120.00	$79.20
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	257	123	$205.00	$120.25
99213 Established patient office or other outpatient visit, typically 15 minutes	197	116	$140.00	$82.37
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	42	42	$220.00	$129.13
G0008 Administration of influenza virus vaccine	34	31	$50.00	$18.58
90662 Influenza vaccine split virus, preservative free	33	30	$73.18	$54.65
99239 Hospital discharge day management, more than 30 minutes	26	24	$175.00	$116.20
93000 Routine ekg using at least 12 leads including interpretation and report	23	22	$30.00	$19.09
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	16	15	$220.00	$147.22
G0009 Administration of pneumococcal vaccine	15	15	$50.00	$18.58

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	3,813	969	$115.00	$77.62
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	1,126	874	$325.00	$216.16
99238 Hospital discharge day management, 30 minutes or less	1,085	852	$120.00	$78.72
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	353	146	$205.00	$118.33
99213 Established patient office or other outpatient visit, typically 15 minutes	134	94	$140.00	$80.56
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	72	64	$220.00	$147.00
G0008 Administration of influenza virus vaccine	53	51	$50.00	$23.13
90662 Influenza vaccine split virus, preservative free	51	49	$55.00	$52.13
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	41	41	$220.00	$128.81
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	31	22	$150.00	$98.98
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	21	21	$220.00	$146.09
93000 Routine ekg using at least 12 leads including interpretation and report	14	14	$30.00	$18.90

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	3,186	887	$115.00	$74.75
99223 Initial hospital care with moderate level of medical decision making, if using time, at least 75 minutes	1,014	826	$325.00	$209.70
99238 Hospital discharge day management, 30 minutes or less	960	781	$120.00	$75.73
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more	376	146	$205.00	$114.00
99310 Subsequent nursing facility care with high level of medical decision making, per day, if using time, at least 45 minutes	157	139	$220.00	$142.03
99213 Established patient office or other outpatient visit, typically 15 minutes	133	82	$140.00	$77.91
99309 Subsequent nursing facility care with moderate level of medical decision making, per day, if using time, at least 30 minutes	86	51	$150.00	$95.66
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit	47	47	$220.00	$123.31
G0008 Administration of influenza virus vaccine	30	30	$50.00	$28.74
90662 Influenza vaccine split virus, preservative free	29	29	$55.00	$47.41
99222 Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes	19	18	$220.00	$142.08
99220 Hospital observation care, typically 70 minutes	13	13	$300.00	$192.75

Medical Specialties & State Licenses

CMS Verified: 2022-10-13

Internal Medicine Primary Specialty

NUCC Taxonomy Code: 207R00000X

State License CA A45333

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.

Additional State Medicaid & Healthcare Payer Identifiers

Medicaid State Provider ID

00A453330 (CA)

Practice Associates & Co-Workers

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

5 Associated Practitioners

Dr. Hooman Sazegar , DO

Internal Medicine - Pulmonary Disease

NPI 1073924056

Doctor of Osteopathic Medicine (D.O.)

Dr. Ashish Patel , MD

Internal Medicine - Pulmonary Disease

NPI 1104023977

Doctor of Medicine (M.D.)

Dr. Ayman Saad , MD

Internal Medicine - Pulmonary Disease

NPI 1669679718

Doctor of Medicine (M.D.)

Dr. Daryl Banta , MD

Internal Medicine

NPI 1932299450

Doctor of Medicine (M.D.)

Yepraksia Agazaryan , NP

Nurse Practitioner - Family

NPI 1942911441

Nurse Practitioner

Career & Practice History Timeline

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

8 Historical Events

📍

Updated Practice Location October 13, 2022

Registered at 10 CONGRESS ST STE 155, PASADENA, CA 911053027 (Tel: 6265215331)

📍

Updated Business Mailing Address October 13, 2022

Registered at 10 CONGRESS ST STE 155, PASADENA, CA 911053027 (Tel: 6263845092)

✅

NPI Profile Active June 06, 2013

NPI status registered as active in NPPES database

📍

Updated Practice Location June 06, 2013

Registered at 301 W HUNTINGTON DR, ARCADIA, CA 910073462 (Tel: 6264454558)

📍

Updated Business Mailing Address June 06, 2013

Registered at 959 E WALNUT ST, SUITE 120, PASADENA, CA 911061451 (Tel: 6267951831)

👤

Provider Name / Credentials Updated June 06, 2013

Recorded as ROBERT SIEW, M.D.

🎓

Medical Taxonomy / Specialty Registered (Primary Specialty) June 06, 2013

Internal Medicine (License #A45333 in CA)

🟢

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: 1578539516

Entity Type:

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

Enumeration Date: February 28, 2006

Last Update: October 13, 2022

Sole Proprietor: Yes

Update or Correct Profile

Mailing Address

10 Congress St Ste 155

Pasadena, CA 911053027

Phone: 6263845092

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.