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Orthopaedic Surgery Specialists in Los Alamitos, CA

Browse 11 Orthopaedic Surgery providers listed in NPPES with a practice address in Los Alamitos, California.

11 Healthcare Providers

How Los Alamitos compares with the U.S.

Los Alamitos has 93 clinicians in Orthopaedic Surgery per 100,000 residents, 12.6 times the U.S. rate of 7.4.

That is 11 active clinicians in Orthopaedic Surgery with a practice address in Los Alamitos, for a population of 11,794.

The California rate is 5.8 per 100,000 residents.

What these numbers mean

Clinicians per 100,000 residents compares places of different sizes. We count active clinicians who list a practice address in the area in the federal NPI registry (NPPES) and divide by the number of people who live there, according to the U.S. Census Bureau. The U.S. rate is the same calculation for the whole country.

A higher number does not mean it is easier to get an appointment, that wait times are shorter, or that care is better. It also does not show how many clinicians are accepting new patients or which insurance plans they take. A lower number does not by itself mean there is a shortage.

City counts use the city name in each clinician's practice address. That postal city can cover a larger or smaller area than the city limits the Census Bureau uses for population, and many clinicians list only one address even if they work in several places. Cities with hospitals or large medical centers often list more specialists than the number of residents alone would suggest, because patients also come from nearby areas.

Too few clinicians in Orthopaedic Surgery in Los Alamitos are listed in the CMS Medicare file to report Medicare assignment or telehealth shares.

These figures summarize public federal data. They do not measure quality of care, appointment availability, or whether a clinician accepts your insurance or new patients. Registry addresses can be out of date. Please confirm details directly with the office and your plan. This information is not medical advice.

Prepared by T-MedInfo from NPPES, CMS and U.S. Census Bureau data. Questions or corrections: support@true-medinfo.com ยท Methodology

Sources: Clinician counts and practice addresses: NPPES NPI Registry, Centers for Medicare & Medicaid Services (CMS), data as of August 2026. Population: U.S. Census Bureau, American Community Survey 2020-2024 5-Year Estimates, Table B01003 (Total Population).

Showing 1โ€“11 of 11 providers
With recent CMS data first, then Aโ€“Z

Dr. Duke Ahn , MD

Orthopaedic Surgery

Active NPI Status Accepts Medicare Assignment
3700 Katella Ave Ste C, Los Alamitos, CA 907206409
Phone: 5625832250
NPI Identifier 1942318373
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Dr. Lawrence Allen Feiwell , MD

Orthopaedic Surgery

Active NPI Status Accepts Medicare Assignment
3742 Katella Ave, Suite 401, Los Alamitos, CA 907203102
Phone: 5624314800
NPI Identifier 1932201787
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Dr. Andrew Maxwell Hanflik , MD

Orthopaedic Surgery

Active NPI Status Accepts Medicare Assignment
3851 Katella Ave Ste 150, Los Alamitos, CA 907203353
Phone: 5623141400
NPI Identifier 1508008178
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Dr. Raymond A. Klug , MD

Orthopaedic Surgery

Active NPI Status Accepts Medicare Assignment
3771 Katella Ave, #310, Los Alamitos, CA 907203115
Phone: 5624303561
NPI Identifier 1295829083
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Dr. Diana Lau , MD

Orthopaedic Surgery

Active NPI Status
3851 Katella Ave Ste 150, Los Alamitos, CA 907203353
Phone: 5623141400
NPI Identifier 1669600011
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Dr. Perry Robert Secor , MD

Orthopaedic Surgery

Active NPI Status
3851 Katella Ave Ste 150, Los Alamitos, CA 907203353
Phone: 5623141400
NPI Identifier 1548237795
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Dr. Grietje Van Dyk , MD

Orthopaedic Surgery

Active NPI Status
3851 Katella Ave Ste 150, Los Alamitos, CA 907203353
Phone: 5623141400
NPI Identifier 1003126830
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Dr. Stephen A Wertheimer , MD

Orthopaedic Surgery

Active NPI Status
4290 Katella Ave, Los Alamitos, CA 90720
Phone: 5624934499
NPI Identifier 1952747701
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Dr. Joseph B Alban , MD

Orthopaedic Surgery

Active NPI Status
4290 Katella Ave, Los Alamitos, CA 90720
Phone: 5624934499
NPI Identifier 1194161844
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Dr. Laura Wertheimer Hatch , MD

Orthopaedic Surgery

Active NPI Status
4290 Katella Ave, Los Alamitos, CA 90720
Phone: 5624934499
NPI Identifier 1568808210
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Dr. Tomoji Mizuguchi , MD

Orthopaedic Surgery

Active NPI Status
4290 Katella Ave, Los Alamitos, CA 907203562
Phone: 5624934499
NPI Identifier 1710198627
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Frequently Asked Questions about Orthopaedic Surgery in Los Alamitos

How do I check a Orthopaedic Surgery practitioner's license?

Each practitioner profile shows the NUCC taxonomy code and any state license number the practitioner reported to NPPES, plus a link to the California licensing board lookup. NPPES entries are self-reported; current license status is published only by the state board.

Why is a practitioner missing from this list?

This list shows NPI records that are active in NPPES. A deactivated NPI keeps its profile with the deactivation date and practice history; find it with the site search by name or NPI number.