Dr. Isaac Paz , MD
Surgery โข Lancaster, CA
44151 15th St W
Lancaster, CA 935344079
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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NPI assigned on September 7, 2006; this date does not establish years in practice.
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Published CMS data list 724 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 99213 โ Established patient outpatient office visit: 120 service units.
- 99214 โ Established patient outpatient office visit: 119 service units.
- 99204 โ New patient outpatient office visit: 78 service units.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPTยฎ only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 17 records in the table ยท Guide: How to read Medicare Part B data
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Published CMS data list 61 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Tramadol Hcl โ 61 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See the full table ยท Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 85% of clinicians listed under Surgery in California (2024, 1,346 clinicians with data). Median for this group: 213. Middle half: 101 to 404.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 468 in 2020 to 724 in 2024.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2020โ2024.
Practice Location & Contact Primary Location
44151 15th St W
Lancaster, CA 935344079
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 2 distinct additional practice-address records in Duarte, CA; South Pasadena, CA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
CMS Doctors and Clinicians lists 1 group name: City Of Hope Medical Foundation. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
1981
What Public CMS Data Show
Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
316 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider, 2024.
Medicare-allowed amount
About $117,285 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
Paid by Medicare
About $91,604 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners โ by Provider and Service, 2024.
30-day fills
61 standardized 30-day fills in 2024
CMS converts prescriptions to 30-day supplies so they can be compared. A 90-day prescription counts as about three 30-day fills.
What this does not show: 30-day fills
It is not a count of patients and not a measure of quality.
Part D drug cost
$97 in 2024
The total cost of these prescriptions in 2024, paid by Medicare drug plans, patients and other payers together.
It shows the total spending on drugs this clinician prescribed, not what any one patient paid.
What this does not show: Part D drug cost
A higher cost often reflects the type of medicines a specialty uses. It is not your out-of-pocket cost and not a measure of quality.
Source: CMS, Medicare Part D Prescribers โ by Provider and Drug, 2024.
Open Payments general payments, program year 2024
All general payments: $82.31 across 2 records.
By nature of payment
- Food and Beverage: $82.31 across 2 records.
Reporting-company totals
- GlaxoSmithKline, LLC.: $64.61 across 1 record.
- Ipsen Biopharmaceuticals, Inc: $17.70 across 1 record.
A reported payment does not necessarily mean the financial relationship is improper and is not a measure of care quality. Clinicians can review and dispute these records.
Source: Calculated by T-MedInfo from CMS Open Payments general-payment records for program year 2024 (published June 30, 2026).
Years since graduation
45 years (graduated 1981)
CMS Doctors and Clinicians data list 1981 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, โDoes your provider accept Medicare as full payment?โ
Telehealth (some services)
Recent Medicare claims show this clinician provided some services by telehealth, such as a video or phone visit.
You may be able to have some visits without going to the office. Ask which visits can be done by telehealth.
What this does not show: Telehealth (some services)
It does not mean all services are offered by telehealth, or that telehealth is covered by your plan.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Paz has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Paz as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Lancaster and California
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 85% of clinicians listed under Surgery in California (2024, 1,346 clinicians with data). Median for this group: 213. Middle half: 101 to 404.
Too few clinicians listed under Surgery in Lancaster have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 85% of clinicians listed under Surgery in California (2024, 1,346 clinicians with data). Median for this group: $32,453. Middle half: $13,159 to $66,109.
Too few clinicians listed under Surgery in Lancaster have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 85% of clinicians listed under Surgery in California (2024, 1,346 clinicians with data). Median for this group: $24,935. Middle half: $10,148 to $50,637.
Too few clinicians listed under Surgery in Lancaster have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
Close to the middle for clinicians listed under Surgery in California (2024, 1,327 clinicians with data). Median for this group: 54. Middle half: 26 to 105.
Too few clinicians listed under Surgery in Lancaster have Medicare Part D data for 2024 to compare.
Part D drug cost
A lower Part D drug cost than 80% of clinicians listed under Surgery in California (2024, 1,327 clinicians with data). Median for this group: $346. Middle half: $126 to $1,126.
Too few clinicians listed under Surgery in Lancaster have Medicare Part D data for 2024 to compare.
13 active clinicians are listed under Surgery with a practice address in Lancaster, CA (3,120 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Lancaster
23.1% of these 13 clinicians have the CMS telehealth indicator.
46.2% of these 13 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 55% from 468 in 2020 to 724 in 2024.
- 2020: 468
- 2021: 481
- 2022: 467
- 2023: 682
- 2024: 724
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Medicare-allowed amount
Medicare-allowed amount increased 77% from $66,226 in 2020 to $117,285 in 2024.
- 2020: $66,226
- 2021: $59,610
- 2022: $55,040
- 2023: $99,460
- 2024: $117,285
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Paid by Medicare
Paid by Medicare increased 76% from $52,047 in 2020 to $91,604 in 2024.
- 2020: $52,047
- 2021: $46,272
- 2022: $42,938
- 2023: $78,311
- 2024: $91,604
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 177% from 22 in 2020 to 61 in 2024.
- 2020: 22
- 2021: 60
- 2022: 91
- 2023: 90
- 2024: 61
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30-day fills
30-day fills increased 177% from 22 in 2020 to 61 in 2024.
- 2020: 22
- 2021: 60
- 2022: 94
- 2023: 90
- 2024: 61
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Part D drug cost
Part D drug cost went from $60 in 2020 to $97 in 2024.
- 2020: $60
- 2021: $962
- 2022: $2,189
- 2023: $8,598
- 2024: $97
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Industry payments (Open Payments)
Industry payments (Open Payments) decreased 97% from $3,266.71 in 2019 to $82.31 in 2024.
- 2019: $3,266.71
- 2023: $30.27
- 2024: $82.31
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2024), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo ยท Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2024 (payments made January 1 โ December 31, 2024): fewer than 11 records totaling $82.31.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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โ | General | $64.61 |
| Ipsen Biopharmaceuticals, Inc |
Food and Beverage
In-kind items and services
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Onivyde | General | $17.70 |
Source: CMS Open Payments, program year 2024, released June 30, 2026.
Performed Procedures & Service Volume
CPTยฎ is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016โ2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners โ by Provider and Service data, 2017โ2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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120 | 90 | $326.57 | $97.05 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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119 | 88 | $452.73 | $135.96 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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78 | 78 | $616.36 | $179.51 |
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99232
Subsequent hospital care with moderate levelof medical decision making, if using time, at least 35 minutes
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55 | 26 | $288.69 | $83.78 |
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14302
Repair of wound by transferring skin, each additional 30.0 sq cm
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44 | 16 | $781.91 | $226.90 |
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99213
Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
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37 | 35 | $167.00 | $70.22 |
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99204
New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more
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36 | 36 | $451.00 | $141.68 |
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99214
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
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31 | 27 | $256.00 | $103.68 |
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76998
Ultrasonic guidance during surgery
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29 | 29 | $239.00 | $47.21 |
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38900
Imaging of lymph nodes during surgery
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27 | 27 | $430.18 | $143.14 |
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38525
Biopsy or removal of deep lymph nodes of underarm
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26 | 26 | $1372.00 | $274.74 |
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19301
Partial removal of breast
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24 | 24 | $1967.02 | $439.31 |
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14301
Repair of wound by transferring skin, 30.1-60.0 sq cm
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22 | 21 | $3234.45 | $881.81 |
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99441
Telephone medical discussion with physician, 5-10 minutes
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22 | 22 | $205.76 | $55.97 |
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99222
Initial hospital care with straightforward or low-level medical decision making, if using time, at least 55 minutes
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20 | 14 | $474.04 | $138.67 |
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99203
New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more
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18 | 18 | $421.61 | $123.64 |
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99442
Telephone medical discussion with physician, 11-20 minutes
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16 | 14 | $308.44 | $87.70 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Medicare Part D Prescribing Profile & Medications
Medicare Part D prescriptions filled, including refills, in 2024.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Tramadol Hcl | Tramadol Hcl | 61 | 230 | $97.09 | 55 |
Source: CMS Part D by Provider and Drug, 2024; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
Self-certified to NPPES: 2020-10-28NUCC Taxonomy Code: 208600000X
A general surgeon has expertise related to the diagnosis - preoperative, operative and postoperative management - and management of complications of surgical conditions in the following areas: alimentary tract; abdomen; breast, skin and soft tissue; endocrine system; head and neck surgery; pediatric surgery; surgical critical care; surgical oncology; trauma and burns; and vascular surgery. General surgeons increasingly provide care through the use of minimally invasive and endoscopic techniques. Many general surgeons also possess expertise in transplantation surgery, plastic surgery and cardiothoracic surgery.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - GENERAL SURGERY
I20050110000778
CA
4587560941
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
City Of Hope Medical Foundation
209 Fair Oaks Ave, South Pasadena, CA 910301814
Phone: 6263962900
Secondary Practice Locations
209 Fair Oaks Ave
South Pasadena, CA 910301814
Phone: 6263962900
1500 E Duarte Rd
Duarte, CA 91010
Phone: 6263598111
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Pediatrics - Pediatric Hematology-Oncology
Doctor of Medicine (M.D.)
Urology
Doctor of Medicine (M.D.)
Internal Medicine - Hematology & Oncology
Doctor of Medicine (M.D.)
Urology
Doctor of Medicine (M.D.)
Surgery - Surgical Oncology
Doctor of Medicine (M.D.)
Surgery
Doctor of Medicine (M.D.), Master of Public Health
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 44151 15TH ST W, LANCASTER, CA 935344079 (Tel: 6619025600)
Registered at PO BOX 512185, LOS ANGELES, CA 900510185 (Tel: 6267753514)
Registered at 44151 15TH ST W, LANCASTER, CA 935344079 (Tel: 6619025600)
Registered at PO BOX 512185, LOS ANGELES, CA 900510185 (Tel: 6267753514)
NPI status registered as active in NPPES database
Registered at 209 FAIR OAKS AVE, SOUTH PASADENA, CA 910301814 (Tel: 6263962900)
Registered at 1333 S MAYFLOWER AVE FL 2, MONROVIA, CA 910164066 (Tel: (626) 775-3514)
Recorded as ISAAC PAZ, MD
Surgery (license number reported to NPPES: CA A48296)
NPI status registered as active in NPPES database
Registered at 1500 E DUARTE RD, DUARTE, CA 91010 (Tel: 6263598111)
Registered at PO BOX 5063, MONROVIA, CA 910177163 (Tel: 6267753200)
Recorded as ISAAC PAZ, MD
Surgery (license number reported to NPPES: CA A48296)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Surgery Specialists in Lancaster
- Dr. Sonam Kapadia, MD
- Dr. Aldo Gamarra, MD
- Dr. Edgardo Barcelona, MD
- Dr. Weston Bush, MD, MPH
- Dr. Alexander Chokler, MD
- Dr. Sahil Parikh, DO
Mailing Address
Po Box 512185
Los Angeles, CA 900510185
Phone: 6267753514