DR. ROY B BLUMENSTRAUCH M.D.
NPI 1639175409
Specialist in Torrance, CA

Q: What is Roy Blumenstrauch's NPI number?

The NPI number for Roy Blumenstrauch is 1639175409. It was assigned to this individual provider in the NPPES registry on June 24, 2005.

Q: What is Roy Blumenstrauch's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Q: When was this NPI record last updated?

The NPPES record for Roy Blumenstrauch was last updated on November 27, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.

Active since June 24, 2005PECOS EnrolledAccepts Medicare Assignment

75/100

CMS Quality Rating

4201 TORRANCE BLVD, STE 640, TORRANCE, CA 90503(310) 543-4444(310) 543-4446 Get Directions Write a Review

NPPES record last updated: November 27, 2007. Verified against the NPPES registry weekly; last sync: October 25, 2026.

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About Dr. Roy B Blumenstrauch M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. ROY B BLUMENSTRAUCH M.D. (NPI 1639175409) is an individual specialist in Torrance, California, licensed in California (G54548) and active in the NPI registry since June 2005. He is enrolled in Medicare PECOS and is a graduate of University Of California, Geffen School Of Medicine (1983).

NPPES Registry Identity

NPI1639175409

Entity TypeIndividualMale

Primary Taxonomy174400000X

Provider Legal NameDR. ROY B BLUMENSTRAUCHCredential: M.D.

Location Address4201 TORRANCE BLVD, STE 640Torrance, CA 90503-4504

Mailing Address4201 Torrance Blvd, Ste 640Torrance, CA 90503-4504 · (310) 543-4444 · Fax (310) 543-4446

Phone(310) 543-4444

Fax(310) 543-4446

Sole ProprietorNo

Medical School CMSUniversity Of California, Geffen School Of MedicineGraduated 1983

Enumeration DateJune 24, 2005

Last NPPES UpdateNovember 27, 2007

✔ NPI 1639175409 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtySpecialistOther Service Providers

Taxonomy Code174400000X

License✔ Licensed in CA · G54548

Definition

An individual educated and trained in an applied knowledge discipline used in the performance of work at a level requiring knowledge and skills beyond or apart from that provided by a general education or liberal arts degree.

4201 TORRANCE BLVD, Torrance, CA 90503

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Other Identifiers 1

Medicare UPINWG54548GCA

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Roy B Blumenstrauch M.d. is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID4789754334

PECOS Enrollment IDI20080609000396

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show Roy Blumenstrauch reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Csi Medical Group

7.5 mi

MOHS-Micrographic Surgery

1360 W 6TH ST STE 370
San Pedro, CA 90732

Reassigned Medicare billing, California enrollment
179 clinicians in this Medicare group

NPI 1871909804 (310) 519-8890

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 43

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Destruction of precancer skin growth, 2-14 growths 17003

This procedure involves removing 2-14 precancerous skin growths. The growths are treated to prevent them from potentially developing into skin cancer. The process is safe, with minimal discomfort, and promotes healthier skin.

10,535 services844 patients

Destruction of precancer skin growth, 1 growth 17000

"Destruction of precancer skin growth" is a procedure that eliminates a single precancerous skin growth. This is done to prevent it from developing into skin cancer. The growth may be removed using various methods such as cryotherapy (freezing), laser therapy, or topical medications.

2,289 services969 patients

Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more 99213

This is a routine visit for patients who have already been seen by the healthcare provider. During this approximately 20-29 minute appointment, your health status will be evaluated and any necessary treatments or tests will be discussed. It's a chance to address any health concerns you may have.

1,867 services951 patients

Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214

This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.

1,316 services923 patients

Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, 1-5 tissue blocks 17311

This procedure involves the careful removal of a growth from the head, neck, hands, or feet. The removed tissue, divided into 1-5 blocks, is then examined under a microscope to study its characteristics and determine the nature of the growth.

361 services212 patients

Destruction of skin growth, 1-14 growths 17110

"Destruction of skin growth" refers to a procedure where 1-14 abnormal skin growths are removed. This is done using methods such as freezing, burning, or laser therapy. It helps prevent the growth from causing discomfort or turning into a more serious condition.

271 services221 patients

Shaving of skin growth of face, ears, eyelids, nose, lips, or mouth, 0.5 cm or less 11310

This procedure involves the careful removal of a small skin growth on the face or related areas. A medical professional uses a special tool to gently shave off the growth, which is 0.5 cm or less. It's a common, safe procedure.

201 services143 patients

Shaving of skin growth of face, ears, eyelids, nose, lips, or mouth, 0.6-1.0 cm 11311

This procedure involves removing a small skin growth on the face or related areas like the ears, eyelids, nose, lips, or mouth. The growth is gently shaved off, typically under local anesthesia. It's a quick, safe process for growths between 0.6-1.0 cm in size.

179 services143 patients

Removal and microscopic exam of growth of head, neck, hands, feet, or genitals, each additional stage, 1-5 tissue blocks 17312

This procedure involves the careful removal of abnormal growths from the head, neck, hands, or feet. The removed tissues, divided into 1-5 blocks, are then examined under a microscope to identify any irregularities. The process may be carried out in multiple stages for thorough examination.

172 services116 patients

Injection, triamcinolone acetonide, not otherwise specified, 10 mg J3301

Triamcinolone acetonide is a medication used to reduce inflammation in the body. It's given as a 10 mg injection for conditions like allergies, arthritis, or skin problems. The injection helps to decrease swelling, redness, and itching.

162 services54 patients

Biopsy of related skin growth, first growth 11102

A biopsy of a skin growth involves taking a small sample of the growth to examine it under a microscope. This helps determine if the growth is harmful. The procedure is typically quick, with minimal discomfort. It's a crucial step in ensuring your skin's health.

161 services143 patients

Injection into skin growth, 1-7 growths 11900

This procedure involves injecting medication into 1-7 skin growths. The medication helps to reduce the size of the growths or completely eliminate them. It's a simple, quick, and usually painless process performed by a medical professional.

152 services53 patients

Destruction of precancer skin growth, 15 or more growths 17004

This procedure involves removing 15 or more precancerous skin growths to prevent them from developing into cancer. It's done using various methods like freezing, creams, or minor surgery. The goal is to protect your health by stopping cancer before it starts.

147 services112 patients

Shaving of skin growth of body, arms, or legs, 0.6-1.0 cm 11301

This procedure involves the careful removal of a small skin growth on the body, arms, or legs. It's done by shaving off the growth that's 0.6-1.0 cm in size. It's a common, safe method to treat non-cancerous skin growths and improve skin appearance.

143 services117 patients

New patient office or other outpatient visit with moderate level of medical decision making, if using time, 45 minutes or more 99204

This is a first-time office or outpatient visit lasting between 45-59 minutes. The healthcare provider evaluates your health, discusses your medical history, and may suggest further tests or treatments. It's an opportunity to ask questions and understand your health better.

128 services128 patients

New patient office or other outpatient visit with low level of medical decision making, if using time, 30 minutes or more 99203

This service involves an initial office or outpatient visit for a new patient. The healthcare professional will spend 30-44 minutes understanding your health history, current issues, and discussing possible treatment plans. It's a comprehensive evaluation to start your healthcare journey.

121 services121 patients

Shaving of skin growth of scalp, neck, hands, feet, or genitals, 0.6-1.0 cm 11306

This procedure involves the careful removal of a small skin growth, between 0.6-1.0 cm in size, from the scalp, neck, hands, or feet. It's done using a special tool to gently shave off the growth, ensuring minimal discomfort.

116 services97 patients

Intermediate repair of wound of face, ears, eyelids, nose, lips, or mouth, 2.5 cm or less 12051

This procedure involves repairing a wound on your face, ears, eyelids, nose, lips, or mouth. The wound is 2.5 cm or less in size. The repair process includes cleaning, treating, and stitching the wound to promote optimal healing. It's a standard, safe procedure.

99 services80 patients

Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.5 cm or less 12031

This procedure involves the repair of a wound that is located on the scalp, underarms, trunk, arms, or legs and is 2.5 cm or less in size. The repair is intermediate, meaning it's more complex than a simple closure, but not as extensive as a complex repair.

81 services67 patients

Removal and microscopic exam of growth of trunk, arms, or legs, 1-5 tissue blocks 17313

This procedure involves the removal of a growth from your trunk, arms, or legs. The removed tissue, divided into 1-5 blocks, is then examined under a microscope to identify any abnormalities. This helps in diagnosing and planning further treatment.

81 services62 patients

Shaving of skin growth of body, arms, or legs, 1.1-2.0 cm 11302

This procedure involves the careful removal of a skin growth on your body, arms, or legs. The growth is between 1.1 and 2.0 cm. A special tool is used to shave off the growth, which is a quick and relatively painless process.

73 services62 patients

Shaving of skin growth of scalp, neck, hands, feet, or genitals, 0.5 cm or less 11305

This is a procedure where a small skin growth on the scalp, neck, hands, or feet, measuring 0.5 cm or less, is carefully removed. The process involves shaving off the growth layer by layer to ensure complete removal. It's a safe and common practice.

69 services61 patients

Complicated repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet, 1.1-2.5 cm 13131

This procedure involves the complex repair of a wound in areas like the forehead, cheeks, chin, mouth, neck, underarms, hands, or feet. The wound size is between 1.1-2.5 cm. This repair may involve multiple layers of sutures and could require reconstruction of the skin.

68 services64 patients

Shaving of skin growth of body, arms, or legs, 0.5 cm or less 11300

This is a simple procedure where a small skin growth on your body, arms, or legs, measuring 0.5 cm or less, is carefully shaved off. It's typically quick, with minimal discomfort. It helps to prevent any potential health issues related to the growth.

64 services57 patients

Complicated repair of wound of forehead, cheeks, chin, mouth, neck, underarms, genitals, hands, or feet, 2.6-7.5 cm 13132

This procedure involves the complex repair of a wound in areas like the forehead, cheeks, chin, mouth, neck, underarms, hands, or feet. The wound size ranges from 2.6-7.5 cm. The process includes cleaning, removing damaged tissue, and stitching the wound for proper healing.

63 services57 patients

Shaving of skin growth of face, ears, eyelids, nose, lips, or mouth, 1.1-2.0 cm 11312

This procedure involves the careful removal of a skin growth on the face, ears, eyelids, nose, lips, or mouth. The growth being treated is between 1.1 and 2.0 cm in size. The process is typically quick, with minimal discomfort, and aids in maintaining skin health.

50 services45 patients

Shaving of skin growth of scalp, neck, hands, feet, or genitals, 1.1-2.0 cm 11307

This procedure involves the careful removal of a skin growth between 1.1 to 2.0 cm in size. The growth could be located on the scalp, neck, hands, or feet. The process is done using a sharp instrument to shave off the growth, promoting healthier skin.

49 services40 patients

Removal and microscopic exam of growth of trunk, arms, or legs, each additional stage, 1-5 tissue blocks 17314

This procedure involves removing growths from the trunk, arms, or legs. The removed tissues, divided into 1-5 blocks, are then examined under a microscope to identify any abnormalities. This aids in diagnosing and treating your condition effectively.

41 services29 patients

Complicated repair of wound of scalp, arms, or legs, 2.6-7.5 cm 13121

This is a procedure to repair a complex wound on your scalp, arm, or leg that is 2.6-7.5 cm long. It involves cleaning, removing damaged tissue, and stitching the wound to promote healing. It's performed under local or general anesthesia.

40 services33 patients

Destruction of skin growth, 15 or more growths 17111

"Destruction of skin growth" refers to a procedure where unwanted skin growths, such as warts or moles, are removed. In this case, 15 or more growths are treated. Techniques may include freezing, burning, or laser therapy. It's a safe, quick process to improve skin health.

34 services23 patients

Simple or single drainage of skin abscess 10060

A simple or single drainage of skin abscess is a procedure to remove pus from a skin infection. A small cut is made on the abscess, the pus is drained out, and the area is cleaned. This helps to reduce pain, speed up recovery, and prevent the spread of infection.

27 services25 patients

Complicated repair of wound of eyelids, nose, ears, or lip, 1.1-2.5 cm 13151

This procedure involves the intricate repair of a wound that is 1.1 to 2.5 cm long on your eyelids, nose, ears, or lip. The goal is to mend the wound carefully to preserve function and minimize scarring. The process may involve stitching and other techniques.

25 services23 patients

Established patient office or other outpatient visit with straightforward medical decision making, if using time, 10 minutes or more 99212

This is a routine check-up for patients who have previously seen the doctor. During this 10-19 minute visit, the doctor will review your health status, discuss any concerns, and manage ongoing treatments or medications. It's a chance to ensure your health is on track.

25 services23 patients

Biopsy of related skin growth, each additional growth 11103

A biopsy of related skin growth is a procedure where a small piece of skin growth is removed for testing. If additional growths are identified, they may also be biopsied. This helps in diagnosing skin conditions and planning appropriate treatment.

20 services17 patients

Shaving of skin growth of body, arms, or legs, more than 2.0 cm 11303

This procedure involves the removal of a skin growth on your body, arms, or legs that is over 2.0 cm. A special tool is used to shave off the growth, often under local anesthesia. It's a routine, safe process to maintain skin health.

18 services17 patients

Intermediate repair of wound of scalp, underarms, trunk, arms, or legs, 2.6-7.5 cm 12032

This procedure involves the repair of a wound between 2.6-7.5 cm located on the scalp, underarms, trunk, arms, or legs. The process includes cleaning, debridement (removal of damaged tissue), and suturing (stitching) of the wound to promote healing.

17 services14 patients

Complicated repair of wound of scalp, arms, or legs, 1.1-2.5 cm 13120

This is a surgical procedure to mend a complex wound between 1.1 to 2.5 cm on your scalp, arm, or leg. It involves cleaning the wound, removing any damaged tissue, and stitching the skin back together. This helps the wound heal properly and reduces the risk of infection.

17 services17 patients

Aminolevulinic acid hcl for topical administration, 20%, single unit dosage form (354 mg) J7308

Aminolevulinic Acid HCL is a medication applied to the skin to treat certain types of skin conditions. It works by making the skin more sensitive to light, which helps to kill abnormal skin cells. The 20% solution is a single dose of 354 mg.

17 services17 patients

Complicated repair of wound of trunk, 2.6-7.5 cm 13101

This service involves the intricate repair of a wound on your body's main structure, between your neck and limbs. The wound measures 2.6-7.5 cm. The procedure includes deep-layer stitching and may involve repairing damaged tissue.

16 services13 patients

Intermediate repair of wound of neck, hands, feet, or genitals, 2.5 cm or less 12041

This procedure involves the repair of a wound located on the neck, hands, or feet, measuring 2.5 cm or less. The process includes cleaning, closure, and dressing of the wound to promote healing and prevent infection. It is classified as 'intermediate' due to the complexity of the involved area.

15 services15 patients

Removal of cancer skin growth of body, arms, or legs, 1.1-2.0 cm 11602

This procedure involves the surgical removal of a cancerous skin growth on the body, arms, or legs. The growth is between 1.1 and 2.0 cm in size. The goal is to eliminate cancer cells and prevent them from spreading to other parts of the body.

12 services12 patients

Removal of cancer skin growth of body, arms, or legs, 2.1-3.0 cm 11603

This procedure involves the removal of a cancerous skin growth, between 2.1 and 3.0 cm, from the body, arms, or legs. The area is numbed, then the growth is carefully cut out. The goal is to eliminate all cancer cells while minimizing scarring.

12 services11 patients

Removal of noncancer skin growth of body, arms, or legs, 1.1-2.0 cm 11402

This procedure involves the removal of a noncancerous skin growth on the body, arms, or legs that is between 1.1 and 2.0 cm in size. It's a safe and routine procedure performed by a medical professional to improve your skin health and appearance.

11 services11 patients

Medicare Quality Performance CMS QPP · MIPS

Performance in the CMS Quality Payment Program: the MIPS final score across four weighted categories, and the individual quality measures reported to Medicare.

75/100

MIPS Final ScoreMerit-based Incentive Payment System · CMS Quality Payment Program

Scored as part of a group practice

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

SOUTHERN CALIFORNIA PAIN CONSULTANTS INC

Pain Medicine (Interventional Pain Medicine)

4201 TORRANCE BLVD, SUITE 590
TORRANCE, CA 90503

Los Angeles County (310) 540-9888

LABWEST, INC

Clinical Medical Laboratory

4201 TORRANCE BLVD, STE 240
TORRANCE, CA 90503

Los Angeles County (310) 385-9240

DWIGHT WAYNE MALONE M.D.

Family Medicine

4201 TORRANCE BLVD, STE 790
TORRANCE, CA 90503

Los Angeles County (323) 779-2800

JEFFREY JAY COWAN MD INC & HEATHER MILLER MD INC A GENERAL PARTNERSHIP

Obstetrics & Gynecology

4201 TORRANCE BLVD, 600
TORRANCE, CA 90503

Los Angeles County (310) 540-5503

CALIFORNIA HEART & VASCULAR INSTITUTE

Internal Medicine (Cardiovascular Disease)

4201 TORRANCE BLVD, SUITE 790
TORRANCE, CA 90503

Los Angeles County (310) 370-4558

DR. WILLIAM CHUL KIM M.D.

Specialist

4201 TORRANCE BLVD, SUITE 190
TORRANCE, CA 90503

Los Angeles County (310) 543-2521

MRS. ELIZABETH Z UNDERHILL M.P.T.

Physical Therapist

4201 TORRANCE BLVD, SUITE 200
TORRANCE, CA 90503

Los Angeles County (310) 543-4727

DR. REYHANEH HAMIDI MD

Dermatology

4201 TORRANCE BLVD, SUITE 640
TORRANCE, CA 90503

Los Angeles County (310) 543-4444

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Roy Blumenstrauch's NPI number?

The NPI number for Roy Blumenstrauch is 1639175409. It was assigned to this individual provider in the NPPES registry on June 24, 2005.

Where is Roy Blumenstrauch located?

Roy Blumenstrauch practices at 4201 Torrance Blvd Ste 640, Torrance, CA 90503. The listed phone number is (310) 543-4444.

What is Roy Blumenstrauch's specialty?

The primary specialty registered for this NPI is Specialist with taxonomy code 174400000X.

Is Roy Blumenstrauch enrolled in Medicare?

Yes. Roy Blumenstrauch is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organization bills Medicare for Roy Blumenstrauch's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Roy Blumenstrauch reassigns Medicare benefits to Csi Medical Group (San Pedro, CA). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Roy Blumenstrauch's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for Roy Blumenstrauch was last updated on November 27, 2007. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 18 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.