DR. JOSEPH W DIEHL III M.D.
NPI 1366731960
Dermatology - MOHS-Micrographic Surgery in Sn Luis Obisp, CA

Q: What is Joseph Diehl's NPI number?

The NPI number for Joseph Diehl is 1366731960. It was assigned to this individual provider in the NPPES registry on April 4, 2011.

Q: What is Joseph Diehl's specialty?

The primary specialty registered for this NPI is Dermatology, specializing in MOHS-Micrographic Surgery, with taxonomy code 207ND0101X.

Q: When was this NPI record last updated?

The NPPES record for Joseph Diehl was last updated on December 12, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 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 April 04, 2011PECOS EnrolledAccepts Medicare Assignment

75.24/100

CMS Quality Rating

15 SANTA ROSA ST, SN LUIS OBISP, CA 93405(805) 541-2650 Get Directions Write a Review

NPPES record last updated: December 12, 2018. Verified against the NPPES registry weekly; last sync: August 02, 2026.

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About Dr. Joseph W Diehl Iii M.d. NPPES

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

DR. JOSEPH W DIEHL III M.D. (NPI 1366731960) is an individual mohs-micrographic surgery provider in Sn Luis Obisp, California, licensed in California (A124317) and active in the NPI registry since April 2011. He is enrolled in Medicare PECOS and is a graduate of Other (2011).

NPPES Registry Identity

NPI1366731960

Entity TypeIndividualMale

Primary Taxonomy207ND0101X

Provider Legal NameDR. JOSEPH W DIEHL IIICredential: M.D.

Location Address15 SANTA ROSA STSn Luis Obisp, CA 93405-1811

Mailing Address15 Santa Rosa StSn Luis Obisp, CA 93405-1811 · (805) 541-2650

Phone(805) 541-2650

Sole ProprietorNo

Medical School CMSOtherGraduated 2011

Enumeration DateApril 4, 2011

Last NPPES UpdateDecember 12, 2018

✔ NPI 1366731960 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 3

★ Primary SpecialtyDermatology · MOHS-Micrographic SurgeryAllopathic & Osteopathic Physicians

Taxonomy Code207ND0101X

License✔ Licensed in CA · A124317

Definition

The highly-trained surgeons that perform Mohs Micrographic Surgery are specialists both in dermatology and pathology. With their extensive knowledge of the skin and unique pathological skills, they are able to remove only diseased tissue, preserving healthy tissue and minimizing the cosmetic impact of the surgery. Mohs surgeons who belong to the American College of Mohs Surgery (ACMS) have completed a minimum of one year of fellowship training at one of the ACMS-approved training centers in the U.S.

Also ListedDermatologyTaxonomy 207N00000X · License A124317 (CA)

Also ListedStudent in an Organized Health Care Education/Training ProgramTaxonomy 390200000X

15 SANTA ROSA ST, Sn Luis Obisp, CA 93405

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Medicare Participation & PECOS CMS

Medicare enrollment, assignment, and ordering and referring status from the CMS PECOS system.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dr. Joseph W Diehl Iii 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 ID1850604570

PECOS Enrollment IDI20150723007679

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.

Areas of Expertise CMS Part B claims 51

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.

9,814 services1,530 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.

3,478 services2,544 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.

2,662 services2,032 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.

1,201 services974 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.

966 services791 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.

903 services562 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.

677 services535 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.

547 services547 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.

545 services499 patients

Affinity, per square centimeter Q4159

Affinity per square centimeter is a measure often used in medical research. It quantifies how strongly a substance binds to a specific target, like a drug to a receptor, on a microscopic area. This measure helps understand how effective a treatment could be.

462 services17 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.

450 services280 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.

446 services387 patients

Therapy procedure using ultraviolet radiation with tar or petroleum jelly application 96910

This therapy involves applying tar or petroleum jelly on the skin, followed by exposure to ultraviolet radiation. It helps in treating skin conditions by slowing cell growth and reducing inflammation. It's a safe, controlled process, often used for conditions like psoriasis.

292 services11 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.

245 services236 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.

210 services210 patients

Destruction of cancer skin growth of trunk, arms, or legs, 1.1-2.0 cm 17262

This procedure involves removing a cancerous skin growth on the trunk, arms, or legs that is between 1.1 and 2.0 cm in size. The growth is destroyed using methods like surgery, laser, or freezing, aiming to eliminate cancer and prevent its spread.

203 services164 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.

137 services119 patients

Destruction of cancer skin growth of trunk, arms, or legs, 0.6-1.0 cm 17261

This procedure involves the removal of a cancerous skin growth on the trunk, arms, or legs that is between 0.6 and 1.0 cm in size. The goal is to eliminate the cancerous cells and prevent further spread. The method of destruction may vary, including methods such as surgery, laser, or cryotherapy.

99 services88 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.

89 services85 patients

Destruction of cancer skin growth of face, ears, eyelids, nose, lips, or mouth, 0.6-1.0 cm 17281

This procedure involves the removal of cancerous skin growths on the face, ears, eyelids, nose, lips, or mouth that are between 0.6-1.0 cm in size. The goal is to eliminate cancer cells, preventing further spread and promoting health.

89 services78 patients

Destruction of cancer skin growth of scalp, neck, hands, feet, or genitals, 0.6-1.0 cm 17271

This procedure involves the removal of a small cancerous skin growth, between 0.6 to 1.0 cm, located on the scalp, neck, hands, or feet. The aim is to eliminate the cancerous cells and prevent their spread. The treatment is done in a safe, controlled environment.

68 services65 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.

60 services55 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.

58 services46 patients

Complicated repair of wound of eyelids, nose, ears, or lip, 2.6-7.5 cm 13152

This procedure involves repairing a wound on your eyelids, nose, ears, or lip that is between 2.6 and 7.5 cm long. It's considered complicated due to the location and size. The doctor will clean, treat, and stitch the wound to promote healing.

53 services51 patients

Destruction of cancer skin growth of scalp, neck, hands, feet, or genitals, 1.1-2.0 cm 17272

This procedure involves the removal of a cancerous skin growth measuring 1.1-2.0 cm, located on the scalp, neck, hands, or feet. The process may involve techniques like surgery, laser, or cryotherapy. The aim is to eliminate the cancer cells and prevent further spread.

49 services43 patients

Biopsy of ear 69100

A biopsy of the ear is a medical procedure where a small sample of tissue is taken from your ear for examination. This helps doctors diagnose any abnormalities or diseases. It's a simple process, usually done under local anesthesia, and has minimal risks.

49 services43 patients

Application of skin substitute graft to wound of trunk, arms, or legs, 25.0 sq cm or less of wound 100.0 sq cm or less 15271

This procedure involves applying a skin substitute graft to a wound on the trunk, arms, or legs. The graft, a lab-grown skin, is used to cover a wound area of 25.0 sq cm or less, within a total wound area of 100.0 sq cm or less. It aids in healing and regeneration.

47 services14 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.

44 services41 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.

44 services42 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.

40 services40 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.

39 services38 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.

39 services38 patients

Intermediate repair of wound of face, ears, eyelids, nose, lips, or mouth, 2.6-5.0 cm 12052

This procedure involves repairing a wound on the face, ears, eyelids, nose, lips, or mouth that measures between 2.6-5.0 cm. The process includes cleaning, suturing if necessary, and dressing the wound to promote healing and prevent infection.

37 services37 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.

37 services14 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.

34 services34 patients

Destruction of cancer skin growth of face, ears, eyelids, nose, lips, or mouth, 1.1-2.0 cm 17282

This procedure involves the removal of a cancerous skin growth on the face, ears, eyelids, nose, lips, or mouth that measures between 1.1 to 2.0 cm. It's done to prevent the spread of cancer and improve health.

29 services26 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.

22 services21 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.

21 services21 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.

21 services21 patients

Punch biopsy, first skin growth 11104

A punch biopsy is a procedure where a small, circular tool is used to remove a sample of skin tissue. This is usually done to test a skin growth for potential issues. You may feel a pinch, but discomfort is minimal. The area heals quickly.

19 services19 patients

Full thickness skin graft to nose, ears, eyelids, or lips, 20.0 sq cm or less 15260

A full thickness skin graft is a procedure where a layer of skin is taken from one area of the body and transplanted to another. If it's done on the nose, ears, eyelids, or lips, it helps restore these areas when damaged. The size of the graft is 20.0 sq cm or less.

19 services19 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.

18 services18 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.

16 services16 patients

Removal of tissue from wound, 20.0 sq cm or less 97597

This procedure involves the careful removal of damaged or infected tissue from a wound that's 20.0 square cm or less. It's done to promote healing and prevent further infection. The process is carried out under local anesthesia, ensuring minimal discomfort.

16 services13 patients

Repair of wound of eyelids, nose, ears, or lips by transferring skin, 10.0 sq cm or less 14060

This procedure involves repairing a wound on the eyelids, nose, ears, or lips by moving a small piece of skin (10.0 sq cm or less) from one area to another. The goal is to heal the wound and restore the function and appearance of the affected area.

14 services14 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.

13 services13 patients

Removal of noncancer skin growth of body, arms, or legs, 2.1-3.0 cm 11403

This is a procedure where a noncancerous skin growth, sized 2.1-3.0 cm, on the body, arms, or legs is removed. It's typically done under local anesthesia. The process involves cutting out the growth and stitching the skin back together. The aim is to eliminate discomfort and prevent potential health issues.

12 services12 patients

Removal of noncancer skin growth of scalp, neck, hands, feet, or genitals, 1.1-2.0 cm 11422

This procedure involves the removal of a noncancerous skin growth in areas such as the scalp, neck, hands, or feet. The growth being removed is between 1.1 to 2.0 cm in size. The process is safe, typically involves local anesthesia, and is performed by a healthcare professional.

12 services11 patients

Pathology examination of specimen during surgery, first tissue block 88331

A pathology examination during surgery involves the immediate analysis of a removed tissue sample. This helps the surgeon make decisions during your operation. The "first tissue block" refers to the initial sample examined. It's a vital step to ensure your health.

12 services11 patients

Injection of drug or substance under skin or into muscle 96372

This procedure involves administering medication directly under the skin or into a muscle. A small needle is used to inject the drug, allowing it to be absorbed quickly into the bloodstream. It's a common method for delivering a variety of medications.

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

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 93405 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient

$91.64 typical visit price

range $59.84 – $178.89

Typical copayment $22.91 (range $14.96 – $44.72)

Most-billed visit code 99203

Established Patient

$74.24 typical visit price

range $19.70 – $146.55

Typical copayment $18.56 (range $4.92 – $36.63)

Most-billed visit code 99213

Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

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.

75.24/100

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

Individually scored

Quality

98.6

Improvement Activities

Cost

19.34

Reported Quality Measures

Advance Care Plan

100%3,216 patients5/55-star benchmark: 100%

Melanoma: Continuity of Care - Recall System

100%363 patients

Melanoma: Coordination of Care

100%38 patients

Preventive Care and Screening: Tobacco Use: Screening and Cessation Intervention

Patients combinedPopulations: 97% · 1,278 patients

Patients screened: 97% · 1,278 patients

100%27 patients5/55-star benchmark: 100%

Providers report different measures because they deliver different services; reporting more or less information is not a reflection of quality. Star ratings appear only where CMS assigned them.

Other Providers at the Same Location NPPES 6

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

LACEY MORGAN KALINEN PA-C

Physician Assistant (Medical)