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Dr. Johnny Che-Uk Sok, MD, PhD
NPI1265688212PAC ID2567521511
- Medicare patients, 2024
- 13
- Part D claims, 2024
- 390
- Publications
- 4
- Hospital affiliations
- 1
- Industry payments
- $612
- Practice address
- 9961 Sierra Ave, Fontana, CA 92335
- Practice phone
- Call (909) 427-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Sok's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Johnny Che-Uk Sok is an otolaryngologist in Fontana, California
Dr. Sok practices at Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
Dr. Sok's NPI, 1265688212, was assigned on August 11, 2008. Dr. Sok graduated from New York University School of Medicine in 2002. Dr. Sok's Pennsylvania license number on file is MD434708.
NPI and contact details
- NPI
- 1265688212NPI Registry (opens in a new tab)
- Medicare PAC ID
- 2567521511
- NPI enumeration date
- August 11, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (909) 427-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 50
- Medical school graduation
- 2002
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Johnny Che-Uk Sok practices at Fontana Medical Center in Fontana, California
Dr. Sok's primary practice is Fontana Medical Center, at 9961 Sierra Ave, Fontana, CA 92335 in San Bernardino County. The practice phone is (909) 427-5000.
- Fontana Medical Center9961 Sierra Ave, Fontana, CA 92335 · San Bernardino CountyPhone(909) 427-5000
Source: Dmand AI Affiliation Data
Dr. Johnny Che-Uk Sok is affiliated with 1 site of care and 1 medical group
Dr. Sok's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Johnny Che-Uk Sok's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Sok practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fontana Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
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Dr. Johnny Che-Uk Sok is one of 1,107 otolaryngologists in California
Otolaryngology is Dr. Sok's primary specialty in the NPI Registry, under taxonomy code 207Y00000X. Dmand AI has Dr. Sok's licenses on file in 2 states: Pennsylvania and California.
Specialties and state licenses
- Otolaryngology, PennsylvaniaPrimary
- California license
Clinical focus
Dmand AI lists larynx and vocal cord disease among the conditions Dr. Sok treats.
Otolaryngologists near Dr. Sok
Counts of otolaryngologists with a Dmand AI profile, by place and practice. Each opens the list.
1,107otolaryngologists in California11otolaryngologists in Fontana7otolaryngologists at Fontana Medical Center
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Johnny Che-Uk Sok treated 13 Medicare patients in 2024, average age 63
CMS counts 13 Medicare patients who saw Dr. Sok in 2024. The largest group is 85 and over, with 0 patients. Their average risk score is 1.88, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Sok's median patient age at 61, with 61% women.
Medicare patients, 202413
Average age63
Average risk score1.88
Dr. Sok's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Sok's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 61
Patient panel by sex, all payers
- Women61%
- Men39%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Johnny Che-Uk Sok wrote 390 Medicare Part D claims in 2024
In 2024, Dr. Sok wrote 390 Medicare Part D claims for 162 patients. 97% of them were for generic drugs. CMS names the drug for 311 of them, across 11 drugs with 11 or more claims each, at $4,377 in total drug cost. In 2023, CMS named 240 claims across 9 drugs.
Part D claims, 2024390
Drugs named by CMS11
Total drug cost$4,377
Part D patients162
Dr. Sok's Part D claims by kind of drug, 2024
- Generic378 claims97%
- Brand-name12 claims3%
Dr. Sok's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Sok's Part D claims, 2024
- Opioids4%16 of 390 claims
- Antibiotics9%36 of 390 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2402024: 31130%
Drugs named by CMS: 11 in 2024, 9 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Johnny Che-Uk Sok offers telehealth to Medicare patients
Dr. Sok accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Sok as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Upper gastrointestinal (GI) endoscopy for acid reflux: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Johnny Che-Uk Sok has 4 publications on record
Dmand AI links 4 papers to Dr. Sok. The most frequent topics are Transcription Factors, 3T3 Cells and Amino Acid Sequence. Dr. Sok has published most often in EMBO J.
Papers4
Topics Dr. Sok writes about most
- Transcription Factors
- 3T3 Cells
- Amino Acid Sequence
- CCAAT-Enhancer-Binding Proteins
- DNA-Binding Proteins
- Fibroblasts
- Mice, Knockout
- Molecular Sequence Data
Recent publications by Dr. Sok
Anticoagulantsbeta-ThalassemiaLaparoscopy
3T3 CellsAmino Acid SequenceCalcimycin
Mol Cell Biol
3T3 CellsAmino Acid SequenceBase Sequence
See who Dr. Sok researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Sok works with, so you can find a warm path to the right otolaryngologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Johnny Che-Uk Sok received $612 in industry payments from 2018 to 2024
CMS Open Payments shows 9 general payments to Dr. Sok from 6 drug and device companies from 2018 to 2024. Food and beverage make up the largest share, 100% of the total. Mallinckrodt Enterprises LLC paid the most, $218.
General payments to Dr. Sok by program year, 2018 to 2024
Companies that paid Dr. Sok the most, 2018 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Johnny Che-Uk Sok graduated from New York University School of Medicine
Dr. Sok graduated from New York University School of Medicine in 2002.
- Medical school
Source: Dmand AI Professional Profile Data
Dr. Johnny Che-Uk Sok accepts plans from 3 insurance carriers
Dr. Sok is in network with 3 carriers, including Kaiser Permanente, CMS Medicare and Molina. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
- Molina
Plan types Dr. Sok accepts, by number of carriers
- Medicare2
- EPO1
- HMO1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Johnny Che-Uk Sok's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab)Doctors and Clinicians Utilization Data (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Johnny Che-Uk Sok
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Johnny Che-Uk Sok's NPI number?
Dr. Johnny Che-Uk Sok's NPI number is 1265688212. It was assigned on August 11, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Johnny Che-Uk Sok?
Dr. Johnny Che-Uk Sok is an otolaryngologist in Fontana, California. The primary specialty in the NPI Registry is Otolaryngology Physician (taxonomy code 207Y00000X).
Where does Dr. Johnny Che-Uk Sok practice?
Dr. Sok practices at 9961 Sierra Ave, Fontana, CA 92335. Dr. Sok's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
What is Dr. Johnny Che-Uk Sok's office phone number?
The practice phone on file for Dr. Sok is (909) 427-5000.
What is Dr. Johnny Che-Uk Sok's medical license number?
Dr. Sok's Pennsylvania license number on file is MD434708, one of the licenses on file in 2 states.
Which states has Dr. Johnny Che-Uk Sok been licensed in?
Dmand AI has state licenses on file for Dr. Sok in Pennsylvania (2002 to 2012) and California (2009 to 2027).
Which hospitals is Dr. Johnny Che-Uk Sok affiliated with?
Dr. Sok practices at Fontana Medical Center in Fontana, California.
What medical group is Dr. Johnny Che-Uk Sok part of?
Dr. Sok is linked to Southern California Permanente Medical Group.
Does Dr. Johnny Che-Uk Sok accept Medicare?
Yes. CMS lists Dr. Sok as accepting Medicare assignment.
Does Dr. Johnny Che-Uk Sok offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Sok as offering telehealth services.
Show 7 more questionsShow fewer questions
How many Medicare patients does Dr. Johnny Che-Uk Sok see?
CMS counts 13 Medicare patients who saw Dr. Sok in 2024, with an average age of 63.
Where did Dr. Johnny Che-Uk Sok go to medical school?
Dr. Sok graduated from New York University School of Medicine in 2002.
What drugs does Dr. Johnny Che-Uk Sok prescribe most?
In 2024 Medicare Part D data, Dr. Sok's most prescribed drugs by claims were Meloxicam, Famotidine and Pantoprazole Sodium.
Has Dr. Johnny Che-Uk Sok received payments from drug or device companies?
CMS Open Payments shows $612 in general payments to Dr. Sok from 6 companies from 2018 to 2024. The largest total came from Mallinckrodt Enterprises LLC.
How long has Dr. Johnny Che-Uk Sok been practicing?
Dr. Sok graduated from medical school in 2002, 24 years ago.
Does Dr. Johnny Che-Uk Sok do research?
Dmand AI links 4 publications to Dr. Sok.
What insurance does Dr. Johnny Che-Uk Sok accept?
Dr. Sok is in network with 3 carriers, including Kaiser Permanente, CMS Medicare and Molina. Medicare plans come from the most carriers, 2. Check the plan with the practice before a visit.
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