Dr. Yon Yarn , DO
Internal Medicine • Lancaster, CA
43839 15th St W
Lancaster, CA 935344756
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 June 26, 2006; this date does not establish years in practice.
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Published CMS data list 930 Original Medicare Part B services in 2017.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017. Published rows only; this is not a quality measure.
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Published Part B service records, 2017:
- 64418 — Injection of anesthetic agent and/or steroid into suprascapular shoulder nerve: 272 service units.
- 98926 — Osteopathic manipulative treatment, 3-4 body regions: 189 service units.
- 99213 — Established patient outpatient office visit: 173 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2017. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2016 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2017). CPT notice
See all 6 records in the table · Guide: How to read Medicare Part B data
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Published CMS data list 806 Medicare Part D prescriptions, including refills, in 2017.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2017. Published rows only; this is not a quality measure.
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Published Part D records, 2017:
- Hydrocodone-Acetaminophen (Hydrocodone/Acetaminophen) — 307 prescription fills, including refills.
- Ibuprofen — 114 prescription fills, including refills.
- Ibu (Ibuprofen) — 93 prescription fills, including refills.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2017. Drug names come from pharmacy claims. Listing a drug here is not an endorsement or a recommendation.
See all 13 records in the table · Guide: How to read Medicare Part D prescriber data
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Medicare Part D prescriptions went from 2,369 in 2013 to 806 in 2017.
Source: CMS, Medicare Part D Prescribers – by Provider and Drug, 2013–2017.
Practice Location & Contact Primary Location
43839 15th St W
Lancaster, CA 935344756
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
NPPES lists 1 additional practice-address record in Bakersfield, CA. See the list
Source: CMS NPPES NPI Registry, practice location records; release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
What Public CMS Data Show
Internal Medicine: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare-allowed amount
About $130,561 in 2017
The total amount Medicare approved for these services in 2017. 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, 2017.
Paid by Medicare
About $90,514 in 2017
The part of the Medicare-allowed amount that Medicare itself paid in 2017, 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, 2017.
30-day fills
806 standardized 30-day fills in 2017
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
$8,990 in 2017
The total cost of these prescriptions in 2017, 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, 2017.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $12.22 in 2020
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2020.
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.
Medicare assignment not listed
CMS data do not show whether this clinician accepts Medicare assignment. This does not mean they do not accept Medicare. Ask the office.
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?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Can order Medicare-covered services
CMS lists Dr. Yarn 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
Comparisons use 2024 data. The latest CMS data for Dr. Yarn are from 2017.
Medicare Part D
Comparisons use 2024 data. The latest CMS data for Dr. Yarn are from 2017.
55 active clinicians are listed under Internal Medicine with a practice address in Lancaster, CA (17,717 in California).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Lancaster
21.8% of these 55 clinicians have the CMS telehealth indicator.
67.3% of these 55 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
CMS data for Medicare Part B services are available for 2017 only.
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Medicare-allowed amount
CMS data for Medicare-allowed amount are available for 2017 only.
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Paid by Medicare
CMS data for Medicare payment amount are available for 2017 only.
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Medicare Part D prescriptions
Medicare Part D prescriptions decreased 66% from 2,369 in 2013 to 806 in 2017.
- 2013: 2,369
- 2014: 2,365
- 2015: 1,829
- 2016: 2,041
- 2017: 806
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30-day fills
30-day fills decreased 66% from 2,406 in 2013 to 806 in 2017.
- 2013: 2,406
- 2014: 2,391
- 2015: 1,830
- 2016: 2,044
- 2017: 806
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Part D drug cost
Part D drug cost decreased 89% from $81,826 in 2013 to $8,990 in 2017.
- 2013: $81,826
- 2014: $89,654
- 2015: $40,858
- 2016: $35,957
- 2017: $8,990
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $22.82 in 2019 to $12.22 in 2020.
- 2019: $22.82
- 2020: $12.22
Sources: CMS Medicare Physician & Other Practitioners (2017), CMS Medicare Part D Prescribers (2017), CMS Open Payments (2020), 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 2020 (payments made January 1 – December 31, 2020): fewer than 11 records totaling $12.22.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| GlaxoSmithKline, LLC. |
Food and Beverage
In-kind items and services
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ANORO ELLIPTA | General | $12.22 |
Source: CMS Open Payments, program year 2020, 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 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; 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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64418
Injection of anesthetic agent and/or steroid into suprascapular shoulder nerve
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272 | 111 | $598.90 | $220.42 |
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98926
Osteopathic manipulative treatment, 3-4 body regions
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189 | 84 | $80.00 | $45.63 |
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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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173 | 82 | $110.00 | $73.27 |
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64445
Injection of anesthetic agent and/or steroid into lower back and leg nerve (sciatic nerve)
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157 | 86 | $400.00 | $204.44 |
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99336
Established patient assisted living visit, typically 40 minutes
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90 | 25 | $250.00 | $133.31 |
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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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49 | 39 | $150.00 | $106.36 |
Source: CMS Part B by Provider and Service, 2017; 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 2017.
| Brand Name | Generic Name | Prescriptions | Day Supply | Total Cost | Patients |
|---|---|---|---|---|---|
| Hydrocodone-Acetaminophen | Hydrocodone/Acetaminophen | 307 | 3,431 | $3,221.92 | 55 |
| Ibuprofen | Ibuprofen | 114 | 1,090 | $297.31 | 42 |
| Ibu | Ibuprofen | 93 | 899 | $268.57 | 34 |
| Clonazepam | Clonazepam | 76 | 694 | $240.75 | 17 |
| Lorazepam | Lorazepam | 51 | 487 | $141.77 | 12 |
| Oxycodone-Acetaminophen | Oxycodone Hcl/Acetaminophen | 48 | 540 | $1,191.73 | — |
| Methadone Hcl | Methadone Hcl | 30 | 406 | $260.55 | — |
| Ventolin Hfa | Albuterol Sulfate | 21 | 493 | $1,149.92 | — |
| Amoxicillin | Amoxicillin | 16 | 111 | $56.75 | 12 |
| Gabapentin | Gabapentin | 15 | 290 | $65.60 | — |
| Zolpidem Tartrate | Zolpidem Tartrate | 12 | 241 | $85.12 | — |
| Buprenorphine-Naloxone | Buprenorphine Hcl/Naloxone Hcl | 12 | 131 | $1,935.28 | — |
| Azithromycin | Azithromycin | 11 | 55 | $75.22 | — |
Source: CMS Part D by Provider and Drug, 2017; rows below 11 claims omitted by CMS; volume isn’t quality. Privacy limits
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207R00000X
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.
NUCC Taxonomy Code: 207LP2900X
An anesthesiologist who provides a high level of care, either as a primary physician or consultant, for patients experiencing problems with acute, chronic and/or cancer pain in both hospital and ambulatory settings. Patient care needs are also coordinated with other specialists.
NUCC Taxonomy Code: 208VP0014X
Interventional Pain Medicine is the discipline of medicine devoted to the diagnosis and treatment of pain and related disorders principally with the application of interventional techniques in managing subacute, chronic, persistent, and intractable pain, independently or in conjunction with other modalities of treatment.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSSources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Secondary Practice Locations
212 Goodman St
Bakersfield, CA 933052904
Phone: 6616339753
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Physician Assistant - Medical
Physician Assistant (Certified)
Career & Practice History Timeline
Changes recorded in monthly NPPES data files: addresses, names, credentials, specialties and NPI status
Registered at 43839 15TH ST W, LANCASTER, CA 935344756 (Tel: 6619513009)
Registered at 10311 SIRRETTA PEAK PL, BAKERSFIELD, CA 933118923 (Tel: 6618084353)
Recorded as YON YARN, D.O.
Registered at 43839 15TH ST W, LANCASTER, CA 935344756 (Tel: 6619513009)
Registered at 10311 SIRRETTA PEAK PL, BAKERSFIELD, CA 933118923 (Tel: 6618084353)
Recorded as YON YARN, D.O.
NPI status registered as active in NPPES database
Registered at 212 GOODMAN ST, BAKERSFIELD, CA 933052904 (Tel: 6616339753)
Registered at 212 GOODMAN ST, BAKERSFIELD, CA 933052904 (Tel: 6616339753)
Recorded as EDWIN ZONG, D.O.
Anesthesiology (license number reported to NPPES: CA 20A9285)
First registered as active Individual Practitioner in NPPES Database.
NPI Administrative Meta
Other Internal Medicine Providers in Lancaster
- Tun Oo
- Dr. Harihar Agarwal, MD
- Dr. Young Ko, MD
- Dr. Anupam Singla, MD
- Dr. S Joseph Marianayagam, MD
- Dr. Zin Win, MD
Mailing Address
10311 Sirretta Peak Pl
Bakersfield, CA 933118923
Phone: 6618084353