Dr. Nathan S Chung , MD
Surgery • Apple Valley, CA
19341 Bear Valley Road, Suite 205
Apple Valley, CA 92308
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 July 19, 2006; this date does not establish years in practice.
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Published CMS data list 3,213 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 11042 — Removal of skin and tissue, 20.0 sq cm or less: 1,575 service units.
- 99183 — Management of oxygen chamber therapy: 513 service units.
- 99212 — Established patient outpatient office visit: 370 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® 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 10 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 162 Medicare Part D prescriptions, including refills, in 2024.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Published rows only; this is not a quality measure.
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Published Part D records, 2024:
- Doxycycline Hyclate — 37 prescription fills, including refills.
- Cephalexin — 33 prescription fills, including refills.
- Amoxicillin-Clavulanate Potass (Amoxicillin/Potassium Clav) — 21 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2024. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 8 records in the table · Guide: How to read Medicare Part D prescriber data
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More Medicare Part B services than 95% of clinicians listed under Surgery in California (2024, 1,331 clinicians with data). Median for this group: 213. Middle half: 102 to 404.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 1,603 in 2020 to 3,213 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2020–2024.
Practice Location & Contact Primary Location
19341 Bear Valley Road
Suite 205
Apple Valley, CA 92308
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Medico Chirurgical College Of Philadelphia
1994
What Public CMS Data Show
Surgery: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
415 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 – by Provider, 2024.
Medicare-allowed amount
About $239,731 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 – by Provider and Service, 2024.
Paid by Medicare
About $186,946 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 – by Provider and Service, 2024.
30-day fills
170 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
$7,163 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 – by Provider and Drug, 2024.
Open Payments general payments, program year 2025
All general payments: $1,214.27 across 17 records.
By nature of payment
- Food and Beverage: $1,214.27 across 17 records.
Reporting-company totals (3 largest of 4)
- Organogenesis Inc.: $899.52 across 13 records.
- Smith+Nephew, Inc.: $271.04 across 2 records.
- BSN Medical Inc: $24.38 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 2025 (published June 30, 2026).
Years since graduation
32 years (graduated 1994)
CMS Doctors and Clinicians data list 1994 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, “Does your provider accept Medicare as full payment?”
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. Chung 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. Chung 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 Apple Valley and California
Billing and prescribing volume is not a quality rating.
Medicare Part B services
More Medicare Part B services than 95% of clinicians listed under Surgery in California (2024, 1,331 clinicians with data). Median for this group: 213. Middle half: 102 to 404.
Too few clinicians listed under Surgery in Apple Valley have Medicare Part B data for 2024 to compare.
Medicare-allowed amount
A higher Medicare-allowed amount than 95% of clinicians listed under Surgery in California (2024, 1,331 clinicians with data). Median for this group: $32,312. Middle half: $13,187 to $65,830.
Too few clinicians listed under Surgery in Apple Valley have Medicare Part B data for 2024 to compare.
Paid by Medicare
A higher Medicare payment amount than 95% of clinicians listed under Surgery in California (2024, 1,331 clinicians with data). Median for this group: $24,845. Middle half: $10,198 to $50,340.
Too few clinicians listed under Surgery in Apple Valley have Medicare Part B data for 2024 to compare.
Medicare Part D prescriptions
More Part D prescriptions than 85% of clinicians listed under Surgery in California (2024, 1,323 clinicians with data). Median for this group: 54. Middle half: 26 to 102.
Too few clinicians listed under Surgery in Apple Valley have Medicare Part D data for 2024 to compare.
Part D drug cost
A higher Part D drug cost than 90% of clinicians listed under Surgery in California (2024, 1,323 clinicians with data). Median for this group: $345. Middle half: $125 to $1,115.
Too few clinicians listed under Surgery in Apple Valley have Medicare Part D data for 2024 to compare.
13 active clinicians are listed under Surgery with a practice address in Apple Valley, CA (3,123 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Apple Valley
7.7% of these 13 clinicians have the CMS telehealth indicator.
76.9% 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 100% from 1,603 in 2020 to 3,213 in 2024.
- 2020: 1,603
- 2021: 2,185
- 2022: 2,638
- 2023: 3,308
- 2024: 3,213
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Medicare-allowed amount
Medicare-allowed amount increased 107% from $115,954 in 2020 to $239,731 in 2024.
- 2020: $115,954
- 2021: $176,235
- 2022: $205,012
- 2023: $275,982
- 2024: $239,731
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Paid by Medicare
Paid by Medicare increased 107% from $90,326 in 2020 to $186,946 in 2024.
- 2020: $90,326
- 2021: $139,967
- 2022: $163,294
- 2023: $219,193
- 2024: $186,946
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Medicare Part D prescriptions
Medicare Part D prescriptions increased 406% from 32 in 2020 to 162 in 2024.
- 2020: 32
- 2021: 99
- 2022: 102
- 2023: 150
- 2024: 162
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30-day fills
30-day fills increased 431% from 32 in 2020 to 170 in 2024.
- 2020: 32
- 2021: 99
- 2022: 102
- 2023: 150
- 2024: 170
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Part D drug cost
Part D drug cost increased 26% from $5,679 in 2020 to $7,163 in 2024.
- 2020: $5,679
- 2021: $9,512
- 2022: $26,266
- 2023: $7,108
- 2024: $7,163
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $837.84 in 2021 to $1,214.27 in 2025.
- 2021: $837.84
- 2022: $1,843.68
- 2023: $1,733.68
- 2024: $924.46
- 2025: $1,214.27
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Medicare Part D Prescribers (2024), CMS Open Payments (2025), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · 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 2025 (payments made January 1 – December 31, 2025): 17 records totaling $1,214.27.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Smith+Nephew, Inc. |
Food and Beverage
In-kind items and services
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GRAFIX PL | General | $137.41 |
| Smith+Nephew, Inc. |
Food and Beverage
In-kind items and services
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GRAFIX PL | General | $133.63 |
| Organogenesis Inc. |
Food and Beverage
In-kind items and services
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PURAPLY WOUND MATRIX | General | $132.02 |
| Organogenesis Inc. |
Food and Beverage
In-kind items and services
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CYGNUS MATRIX | General | $114.98 |
| Organogenesis Inc. |
Food and Beverage
In-kind items and services
|
APLIGRAF | General | $112.32 |
| Organogenesis Inc. |
Food and Beverage
In-kind items and services
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VIA MATRIX | General | $96.43 |
| Organogenesis Inc. |
Food and Beverage
In-kind items and services
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CYGNUS MATRIX | General | $94.54 |
| Organogenesis Inc. |
Food and Beverage
In-kind items and services
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AFFINITY | General | $93.90 |
| Organogenesis Inc. |
Food and Beverage
In-kind items and services
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AFFINITY | General | $83.31 |
| Organogenesis Inc. |
Food and Beverage
In-kind items and services
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CYGNUS MATRIX | General | $68.98 |
| Organogenesis Inc. |
Food and Beverage
In-kind items and services
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VIA MATRIX | General | $40.30 |
| Organogenesis Inc. |
Food and Beverage
In-kind items and services
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APLIGRAF | General | $30.01 |
| Organogenesis Inc. |
Food and Beverage
In-kind items and services
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PURAPLY WOUND MATRIX | General | $26.23 |
| BSN Medical Inc |
Food and Beverage
In-kind items and services
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CUTIMED | General | $24.38 |
| ConvaTec Inc. |
Food and Beverage
In-kind items and services
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AQUACEL FOAM | General | $19.33 |
| Organogenesis Inc. |
Food and Beverage
In-kind items and services
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APLIGRAF | General | $4.50 |
| Organogenesis Inc. |
Food and Beverage
In-kind items and services
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AFFINITY | General | $2.00 |
Source: CMS Open Payments, program year 2025, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2016–2023 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 – by Provider and Service data, 2017–2024; 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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11042
Removal of skin and tissue, 20.0 sq cm or less
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1,575 | 309 | $400.00 | $58.40 |
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99183
Management of oxygen chamber therapy
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513 | 47 | $600.00 | $100.02 |
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99212
Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more
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370 | 238 | $100.00 | $33.89 |
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15271
Application of skin substitute graft to wound of trunk, arms, or legs, 25.0 sq cm or less of wound 100.0 sq cm or less
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234 | 85 | $500.00 | $80.01 |
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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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222 | 222 | $450.00 | $128.15 |
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15002
Preparation of skin graft site of trunk, arms, or legs, 100.0 sq cm or 1% body area for infants and children, or less
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87 | 71 | $850.00 | $209.34 |
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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
|
63 | 32 | $125.00 | $63.47 |
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11043
Removal of muscle and/or tissue, 20.0 sq cm or less
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58 | 37 | $700.00 | $146.96 |
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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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55 | 51 | $253.64 | $93.54 |
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11045
Removal of skin and tissue, each additional 20.0 sq cm or less
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36 | 16 | $250.00 | $23.63 |
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 |
|---|---|---|---|---|---|
| Doxycycline Hyclate | Doxycycline Hyclate | 37 | 291 | $268.70 | 30 |
| Cephalexin | Cephalexin | 33 | 240 | $217.67 | 33 |
| Amoxicillin-Clavulanate Potass | Amoxicillin/Potassium Clav | 21 | 160 | $179.97 | 21 |
| Mupirocin | Mupirocin | 18 | 427 | $108.07 | — |
| Gentamicin Sulfate | Gentamicin Sulfate | 18 | 669 | $792.02 | 11 |
| Sulfamethoxazole-Trimethoprim | Sulfamethoxazole/Trimethoprim | 12 | 87 | $37.67 | 12 |
| Ssd | Silver Sulfadiazine | 12 | 397 | $135.37 | — |
| Santyl | Collagenase Clostridium Hist. | 11 | 330 | $5,423.96 | — |
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
NUCC 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.
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - GENERAL SURGERY
I20051013000520
CA
4587689062
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Career & Practice History
NPI enumerated July 19, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to November 2026.
NPI Administrative Meta
Other Surgery Specialists in Apple Valley
- Dr. Rao Daluvoy, MD
- Dr. Chris Okwuosa, MD
- Dr. Brian Patterson, MD, MPH
- Dr. James Hartleroad, MD
- Dr. Ferdinand Rico, MD
- Dr. Rakesh Grover, MD
Mailing Address
19341 Bear Valley Road, Suite 205
Apple Valley, CA 92308
Phone: 7602470333