Amber L. Hertz-Tang, MD
Nephrology Physician · Portland, OR
Amber L. Hertz-Tang, MD is a nephrology physician with a practice address in Portland, Oregon, and NPI 1750700076, issued on Apr 15, 2014. Check the license (Oregon MD201408, as entered in NPPES) on the Oregon Medical Board; the Medicare figures below come from public CMS files.
- Name
- Amber L. Hertz-Tang
- Credential
- MD
- Primary taxonomy
- Nephrology Physician 207RN0300X
- License numbers
- MD201408 OR
MD61053860 WA
Self-reported in NPPES; status is on the state search - Practice location
- 9155 SW Barnes RD Ste 402, Portland, OR 97225
- Phone
- (503) 292-7704
- Enumerated
- Apr 15, 2014
- Record last updated
- Sep 25, 2025
- Fax
- (503) 292-7046
- Medicare enrollment
- Enrolled (PECOS I20201014003791); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2014
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest nephrology physician records → All 136 in Oregon → Look up another NPI →
Also registered at 9155 SW Barnes RD Ste 402
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mitchell Hawkey, MDNephrology Physician1144298209
- Nicole Kemper, MDNephrology Physician1326251828
- Thomas Kennefick, MDNephrology Physician1639148737
- Jean Mathew, MDNephrology Physician1497730808
- Chloe Porter, PACMedical Physician Assistant1972168045
- Kathleen Towsey, PA-CMedical Physician Assistant1467750646
Verify Amber L. Hertz-Tang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersOregon Medical Board
Search for license MD201408Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
7% more Medicare Part D claims than the average nephrology physician in 2024
1,563 Medicare Part D claims for 398 beneficiaries, against an average of 1,465 among the 10,986 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims.
Most prescribed
- Amlodipine Besylate128 claims
- Torsemide111 claims
- Losartan Potassium96 claims
- Calcitriol81 claims
- Jardiance79 claims
- Farxiga64 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.
Bills Medicare through one group practice
- Northwest Renal Clinic IncPortland, OR
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Amber L. Hertz-Tang among 136 nephrology physician records in Oregon
Amber L. Hertz-Tang, MD is one of 136 nephrology physician records with a practice address in Oregon. 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 2014, is newer than 83% of them.
- NPI issued2014 · 83% of these records are older, 15% newer
- In a Medicare fileYes · 83% of these records are
- In the CMS Doctors and Clinicians fileYes · 68% of these records are
- Graduated2014 · median 2003 among the 92 with a school on file
- Record last updated2025 · 40% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RN0300X and a Oregon practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Nephrology Physician providers in Oregon
There are 136 nephrology physician records in Oregon.
All 136 in Oregon → Every provider in Portland → Nephrology Physician nationwide →
The 8 nephrology physician records with the nearest ZIP codes
- Karen Douek, MDPortland, OR 972251952370041
- Amy Hackett, MDPortland, OR 972251851468466
- Mitchell Hawkey, MDPortland, OR 972251144298209
- Nicole Kemper, MDPortland, OR 972251326251828
- Thomas Kennefick, MDPortland, OR 972251639148737
- Jean Mathew, MDPortland, OR 972251497730808
- Fareha Nawaz, MDPortland, OR 972251770702839
- Firas Khoury, MDTigard, OR 972241013933480
Common questions
What is Amber L. Hertz-Tang, MD's NPI number?
Amber L. Hertz-Tang, MD's National Provider Identifier (NPI) is 1750700076, issued on Apr 15, 2014. An NPI identifies a provider in billing; it is not a license.
Where is Amber L. Hertz-Tang, MD located?
The NPPES record lists a practice address at 9155 SW Barnes RD Ste 402, Portland, OR, 97225. Phone: (503) 292-7704. Providers update this record themselves, so call before visiting.
How can I verify Amber L. Hertz-Tang, MD's license?
NPPES lists Oregon license number MD201408, as entered by the provider. Search the Oregon Medical Board at https://www.oregon.gov/OMB/Pages/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Amber L. Hertz-Tang, MD prescribe under Medicare Part D?
In 2024, Amber L. Hertz-Tang, MD had 1,563 Medicare Part D claims for 398 beneficiaries; the average among nephrology physician prescribers was 1,465. 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.