Ern Loh, M.D.
Dermatology Physician · Redwood City, CA
Ern Loh, M.D. is a dermatology physician with a practice address in Redwood City, California, and NPI 1144450917, issued on Jul 15, 2009. Check the license (California 109730, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ern Loh
- Credential
- M.D.
- Primary taxonomy
- Dermatology Physician 207N00000X
- License number
- 109730 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1400 Veterans Blvd, Redwood City, CA 94063
- Phone
- (650) 299-3376
- Enumerated
- Jul 15, 2009
- Record last updated
- Aug 26, 2025
- Medicare enrollment
- Enrolled (PECOS I20131209000163); accepts Medicare assignment
- Medical or professional school
- University Of Washington School Of Medicine, 2008
- Entity
- Type 1 · individual
8 nearest dermatology physician records → All 2,083 in California → Look up another NPI →
Also registered at 1400 Veterans Blvd
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Chelsey Andrada-Rickard, PT, DPTPhysical Therapist1700740917
- Lindsay Arboleda, NPFamily Nurse Practitioner1780005710
- Alin AroyanPhysical Therapist1104997766
- Kimya BehrouzianPsychologist1255847414
- Kylie Billingsley, PH.D.Clinical Psychologist1326232273
- Olivia BrasilMental Health Counselor1114232964
Verify Ern Loh in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license 109730Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
15% fewer Medicare Part D claims than the average dermatology physician in 2024
677 Medicare Part D claims for 248 beneficiaries, against an average of 797 among the 12,802 providers of this specialty who prescribed in Part D. Brand-name drugs were 28% of claims.
Most prescribed
- Fluorouracil127 claims
- Calcipotriene62 claims
- Clobetasol Propionate53 claims
- Otezla48 claims
- Mupirocin42 claims
- Betamethasone Diprop Augmented38 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Industry payments in 2024: $374.52
6 payments; by number, the most common kind was food and beverage; the largest payer was E.R. Squibb & Sons, L.L.C. The 10,250 providers of this specialty with any payment received $8,544.61 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Permanente Medical Group IncSacramento, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Ern Loh among 2,083 dermatology physician records in California
Ern Loh, M.D. is one of 2,083 dermatology physician records with a practice address in California. 83% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2009, is newer than 61% of them.
- NPI issued2009 · 61% of these records are older, 36% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2008 · median 2006 among the 1,450 with a school on file
- Record last updated2025 · 58% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207N00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Dermatology Physician providers in California
There are 2,083 dermatology physician records in California.
All 2,083 in California → Every provider in Redwood City → Dermatology Physician nationwide →
The 8 dermatology physician records with the nearest ZIP codes
- Carol Chan, MDRedwood City, CA 940631669550208
- Molly Johnson, MDRedwood City, CA 940631093893638
- Gabriel Molina, MDRedwood City, CA 940631083243786
- Cynthia Ng, MDRedwood City, CA 940631982782488
- Gloria Nguyen, M.D.Redwood City, CA 940631609166149
- Alison Rhein, MDRedwood City, CA 940631164418828
- Pallavi Sprau, MDRedwood City, CA 940631932738341
- Glenda Swetman, M.D.Redwood City, CA 940631093987950
Common questions
What is Ern Loh, M.D.'s NPI number?
Ern Loh, M.D.'s National Provider Identifier (NPI) is 1144450917, issued on Jul 15, 2009. An NPI identifies a provider in billing; it is not a license.
Where is Ern Loh, M.D. located?
The NPPES record lists a practice address at 1400 Veterans Blvd, Redwood City, CA, 94063. Phone: (650) 299-3376. Providers update this record themselves, so call before visiting.
How can I verify Ern Loh, M.D.'s license?
NPPES lists California license number 109730, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ern Loh, M.D. prescribe under Medicare Part D?
In 2024, Ern Loh, M.D. had 677 Medicare Part D claims for 248 beneficiaries; the average among dermatology physician prescribers was 797. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.